diff --git a/Dockerfile b/Dockerfile
index cd0e4f365..a4d424f45 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,2 @@
-FROM kdeneon/all
+FROM kdeneon/all:dev-stable
 RUN sudo apt-get update && sudo apt-get -y install build-essential cmake extra-cmake-modules gettext kio-dev libatasmart-dev libboost-python-dev libkf5config-dev libkf5coreaddons-dev libkf5i18n-dev libkf5iconthemes-dev libkf5parts-dev libkf5service-dev libkf5solid-dev libkpmcore-dev libparted-dev libpolkit-qt5-1-dev libqt5svg5-dev libqt5webkit5-dev libyaml-cpp-dev os-prober pkg-config python3-dev qtbase5-dev qtdeclarative5-dev qttools5-dev qttools5-dev-tools 
diff --git a/src/modules/locale/LocaleConfiguration.cpp b/src/modules/locale/LocaleConfiguration.cpp
index b8f5f6a9e..c612c50c4 100644
--- a/src/modules/locale/LocaleConfiguration.cpp
+++ b/src/modules/locale/LocaleConfiguration.cpp
@@ -43,9 +43,11 @@ LocaleConfiguration::fromLanguageAndLocation( const QString& languageLocale,
                                               const QStringList& availableLocales,
                                               const QString& countryCode )
 {
-    LocaleConfiguration lc = LocaleConfiguration();
+    LocaleConfiguration lc;
+
+    // Note that the documentation how this works is in packages.conf
     QString language = languageLocale.split( '_' ).first();
-    lc.myLanguageLocaleBcp47 = QLocale(language).bcp47Name();
+    lc.myLanguageLocaleBcp47 = QLocale(language).bcp47Name().toLower();
 
     QStringList linesForLanguage;
     for ( const QString &line : availableLocales )
@@ -288,7 +290,7 @@ LocaleConfiguration::isEmpty() const
 
 
 QMap< QString, QString >
-LocaleConfiguration::toMap()
+LocaleConfiguration::toMap() const
 {
     QMap< QString, QString > map;
 
@@ -324,3 +326,9 @@ LocaleConfiguration::toMap()
 
     return map;
 }
+
+QString
+LocaleConfiguration::toBcp47() const
+{
+    return myLanguageLocaleBcp47;
+}
diff --git a/src/modules/locale/LocaleConfiguration.h b/src/modules/locale/LocaleConfiguration.h
index 073d19a5b..04d1db456 100644
--- a/src/modules/locale/LocaleConfiguration.h
+++ b/src/modules/locale/LocaleConfiguration.h
@@ -35,16 +35,21 @@ public:
 
     bool isEmpty() const;
 
+    QMap< QString, QString > toMap() const;
+    // Note that the documentation how this works is in packages.conf
+    QString toBcp47() const;
+
     // These become all uppercase in locale.conf, but we keep them lowercase here to
     // avoid confusion with locale.h.
     QString lang, lc_numeric, lc_time, lc_monetary, lc_paper, lc_name, lc_address,
             lc_telephone, lc_measurement, lc_identification;
-    QString myLanguageLocaleBcp47;
-    QMap< QString, QString > toMap();
 
     // If the user has explicitly selected language (from the dialog)
     // or numbers format, set these to avoid implicit changes to them.
     bool explicit_lang, explicit_lc;
+
+private:
+    QString myLanguageLocaleBcp47;
 };
 
 #endif // LOCALECONFIGURATION_H
diff --git a/src/modules/locale/LocalePage.cpp b/src/modules/locale/LocalePage.cpp
index 2172586ff..8b05ccfba 100644
--- a/src/modules/locale/LocalePage.cpp
+++ b/src/modules/locale/LocalePage.cpp
@@ -489,8 +489,10 @@ LocalePage::updateGlobalStorage()
             ->insert( "locationRegion", location.region );
     Calamares::JobQueue::instance()->globalStorage()
             ->insert( "locationZone", location.zone );
-    Calamares::JobQueue::instance()->globalStorage()
-            ->insert( "locale", m_selectedLocaleConfiguration.myLanguageLocaleBcp47);
+
+    const QString bcp47 = m_selectedLocaleConfiguration.toBcp47();
+    Calamares::JobQueue::instance()->globalStorage()->insert( "locale", bcp47 );
+    cDebug() << "Updated locale globals, BCP47=" << bcp47;
 
     // If we're in chroot mode (normal install mode), then we immediately set the
     // timezone on the live system.
diff --git a/src/modules/locale/locale.conf b/src/modules/locale/locale.conf
index 54a7b584c..459dceb38 100644
--- a/src/modules/locale/locale.conf
+++ b/src/modules/locale/locale.conf
@@ -20,20 +20,24 @@ zone:                       "New_York"
 # GeoIP settings. Leave commented out to disable GeoIP.
 #
 # An HTTP request is made to *geoipUrl* -- depending on the geoipStyle,
-# the URL may be modified before use. The request must return
-# valid JSON data in the FreeGeoIP format; there should
-# be an attribute *time_zone*, with a string value set to the
-# timezone, in <region>/<zone> format.
+# the URL may be modified before use. The request should return
+# valid data in a suitable format, depending on geoipStyle;
+# generally this includes a string value with the timezone
+# in <region>/<zone> format.
 #
 # Note that this example URL works, but the service is shutting
 # down in June 2018.
 #
-# Suitable data looks like
+# Suitable JSON data looks like
 # ```
 #    {"time_zone":"America/New_York"}
 # ```
+# Suitable XML data looks like
+# ```
+#    <Response><TimeZone>Europe/Brussels</TimeZone></Response>
+# ```
 #
-#geoipUrl:                  "freegeoip.net/json"
+#geoipUrl:                  "freegeoip.net"
 
 # GeoIP style. Leave commented out for the "legacy" interpretation.
 # This setting only makes sense if geoipUrl is set, enabliing geoIP.
diff --git a/src/modules/packages/main.py b/src/modules/packages/main.py
index 60ede34fa..f252bc15f 100644
--- a/src/modules/packages/main.py
+++ b/src/modules/packages/main.py
@@ -318,7 +318,10 @@ def subst_locale(plist):
     """
     locale = libcalamares.globalstorage.value("locale")
     if not locale:
-        return plist
+        # It is possible to skip the locale-setting entirely.
+        # Then pretend it is "en", so that {LOCALE}-decorated
+        # package names are removed from the list.
+        locale = "en"
 
     ret = []
     for packagedata in plist:
@@ -364,20 +367,20 @@ def run_operations(pkgman, entry):
     global group_packages, completed_packages, mode_packages
 
     for key in entry.keys():
-        entry[key] = subst_locale(entry[key])
-        group_packages = len(entry[key])
+        package_list = subst_locale(entry[key])
+        group_packages = len(package_list)
         if key == "install":
             _change_mode(INSTALL)
-            if all([isinstance(x, str) for x in entry[key]]):
-                pkgman.install(entry[key])
+            if all([isinstance(x, str) for x in package_list]):
+                pkgman.install(package_list)
             else:
-                for package in entry[key]:
+                for package in package_list:
                     pkgman.install_package(package)
         elif key == "try_install":
             _change_mode(INSTALL)
             # we make a separate package manager call for each package so a
             # single failing package won't stop all of them
-            for package in entry[key]:
+            for package in package_list:
                 try:
                     pkgman.install_package(package)
                 except subprocess.CalledProcessError:
@@ -386,10 +389,10 @@ def run_operations(pkgman, entry):
                     libcalamares.utils.debug(warn_text)
         elif key == "remove":
             _change_mode(REMOVE)
-            pkgman.remove(entry[key])
+            pkgman.remove(package_list)
         elif key == "try_remove":
             _change_mode(REMOVE)
-            for package in entry[key]:
+            for package in package_list:
                 try:
                     pkgman.remove([package])
                 except subprocess.CalledProcessError:
@@ -398,9 +401,9 @@ def run_operations(pkgman, entry):
                     libcalamares.utils.debug(warn_text)
         elif key == "localInstall":
             _change_mode(INSTALL)
-            pkgman.install(entry[key], from_local=True)
+            pkgman.install(package_list, from_local=True)
 
-        completed_packages += len(entry[key])
+        completed_packages += len(package_list)
         libcalamares.job.setprogress(completed_packages * 1.0 / total_packages)
         libcalamares.utils.debug(pretty_name())
 
@@ -444,7 +447,7 @@ def run():
     completed_packages = 0
     for op in operations:
         for packagelist in op.values():
-            total_packages += len(packagelist)
+            total_packages += len(subst_locale(packagelist))
 
     if not total_packages:
         # Avoids potential divide-by-zero in progress reporting
diff --git a/src/modules/packages/packages.conf b/src/modules/packages/packages.conf
index 2d6ca116f..7e5717b7c 100644
--- a/src/modules/packages/packages.conf
+++ b/src/modules/packages/packages.conf
@@ -76,7 +76,7 @@ update_db: true
 #     pre-script: touch /tmp/installing-vi
 #     post-script: rm -f /tmp/installing-vi
 #
-# The pre- and post-scripts are optional, but not both optional: using
+# The pre- and post-scripts are optional, but you cannot leave both out: using
 # "package: vi" with neither script option will trick Calamares into
 # trying to install a package named "package: vi", which is unlikely to work.
 #
@@ -84,11 +84,16 @@ update_db: true
 # packages for software based on the selected system locale. By including
 # the string LOCALE in the package name, the following happens:
 #
-# - if the system locale is English (generally US English; en_GB is a valid
-#   localization), then the package is not installed at all,
-# - otherwise $LOCALE or ${LOCALE} is replaced by the Bcp47 name of the selected
-#   system locale, e.g. nl_BE. Note that just plain LOCALE will not be replaced,
-#   so foo-LOCALE will be unchanged, while foo-$LOCALE will be changed.
+# - if the system locale is English (any variety), then the package is not
+#   installed at all,
+# - otherwise $LOCALE or ${LOCALE} is replaced by the **lower-cased** BCP47
+#   name of the **language** part of the selected system locale (not the
+#   country/region/dialect part), e.g. selecting *nl_BE* will use *nl*
+#   here.
+#
+# Take care that just plain LOCALE will not be replaced, so foo-LOCALE will
+# be left unchanged, while foo-$LOCALE will be changed. However, foo-LOCALE
+# **will** be removed from the list of packages, if English is selected.
 #
 # The following installs localizations for vi, if they are relevant; if
 # there is no localization, installation continues normally.
@@ -127,6 +132,7 @@ update_db: true
 operations:
   - install:
     - vi
+    - vi-${LOCALE}
     - wget
     - binutils
   - remove:
diff --git a/src/modules/plasmalnf/CMakeLists.txt b/src/modules/plasmalnf/CMakeLists.txt
index 15897f98c..e39b1af9f 100644
--- a/src/modules/plasmalnf/CMakeLists.txt
+++ b/src/modules/plasmalnf/CMakeLists.txt
@@ -4,8 +4,13 @@ find_package(ECM ${ECM_VERSION} REQUIRED NO_MODULE)
 # needs a runtime support component (which we don't test for).
 set( lnf_ver 5.41 )
 
+find_package( KF5Config ${lnf_ver} )
 find_package( KF5Plasma ${lnf_ver} )
 find_package( KF5Package ${lnf_ver} )
+set_package_properties(
+    KF5Config PROPERTIES
+    PURPOSE "For finding default Plasma Look-and-Feel"
+)
 set_package_properties(
     KF5Plasma PROPERTIES
     PURPOSE "For Plasma Look-and-Feel selection"
@@ -16,11 +21,19 @@ set_package_properties(
 )
 
 if ( KF5Plasma_FOUND AND KF5Package_FOUND )
-    find_package( KF5 ${lnf_ver} REQUIRED CoreAddons Plasma Package )
+    if ( KF5Config_FOUND )
+        set( option_kf5 Config )
+        set( option_defs WITH_KCONFIG )
+        # set( option_libs KF5::Config )  # Not needed anyway
+    endif()
+
+    find_package( KF5 ${lnf_ver} REQUIRED CoreAddons Plasma Package ${option_kf5} )
 
     calamares_add_plugin( plasmalnf
         TYPE viewmodule
         EXPORT_MACRO PLUGINDLLEXPORT_PRO
+        COMPILE_DEFINITIONS
+            ${option_defs}
         SOURCES
             PlasmaLnfViewStep.cpp
             PlasmaLnfPage.cpp
@@ -32,6 +45,7 @@ if ( KF5Plasma_FOUND AND KF5Package_FOUND )
             page_plasmalnf.ui
         LINK_PRIVATE_LIBRARIES
             calamaresui
+            ${option_libs}
             KF5::Package
             KF5::Plasma
         SHARED_LIB
diff --git a/src/modules/plasmalnf/PlasmaLnfPage.cpp b/src/modules/plasmalnf/PlasmaLnfPage.cpp
index 2b171cc40..c65e79ba2 100644
--- a/src/modules/plasmalnf/PlasmaLnfPage.cpp
+++ b/src/modules/plasmalnf/PlasmaLnfPage.cpp
@@ -23,6 +23,8 @@
 #include "utils/Logger.h"
 #include "utils/Retranslator.h"
 
+#include <QAbstractButton>
+
 #include <KPackage/Package>
 #include <KPackage/PackageLoader>
 
@@ -55,13 +57,18 @@ static ThemeInfoList plasma_themes()
 PlasmaLnfPage::PlasmaLnfPage( QWidget* parent )
     : QWidget( parent )
     , ui( new Ui::PlasmaLnfPage )
+    , m_showAll( false )
     , m_buttonGroup( nullptr )
 {
     ui->setupUi( this );
     CALAMARES_RETRANSLATE(
     {
         ui->retranslateUi( this );
-        ui->generalExplanation->setText( tr( "Please choose a look-and-feel for the KDE Plasma Desktop. You can also skip this step and configure the look-and-feel once the system is installed." ) );
+        ui->generalExplanation->setText( tr(
+            "Please choose a look-and-feel for the KDE Plasma Desktop. "
+            "You can also skip this step and configure the look-and-feel "
+            "once the system is installed. Clicking on a look-and-feel "
+            "selection will give you a live preview of that look-and-feel.") );
         updateThemeNames();
         fillUi();
     }
@@ -75,10 +82,18 @@ PlasmaLnfPage::setLnfPath( const QString& path )
 }
 
 void
-PlasmaLnfPage::setEnabledThemes(const ThemeInfoList& themes)
+PlasmaLnfPage::setEnabledThemes(const ThemeInfoList& themes, bool showAll )
 {
     m_enabledThemes = themes;
 
+    if ( showAll )
+    {
+        auto plasmaThemes = plasma_themes();
+        for ( auto& installed_theme : plasmaThemes )
+            if ( !m_enabledThemes.findById( installed_theme.id ) )
+                m_enabledThemes.append( installed_theme );
+    }
+
     updateThemeNames();
     winnowThemes();
     fillUi();
@@ -87,9 +102,18 @@ PlasmaLnfPage::setEnabledThemes(const ThemeInfoList& themes)
 void
 PlasmaLnfPage::setEnabledThemesAll()
 {
-    setEnabledThemes( plasma_themes() );
+    // Don't need to set showAll=true, because we're already passing in
+    // the complete list of installed themes.
+    setEnabledThemes( plasma_themes(), false );
 }
 
+void
+PlasmaLnfPage::setPreselect( const QString& id )
+{
+    m_preselect = id;
+    if ( !m_enabledThemes.isEmpty() )
+        fillUi();
+}
 
 void PlasmaLnfPage::updateThemeNames()
 {
@@ -162,6 +186,11 @@ void PlasmaLnfPage::fillUi()
         {
             theme.widget->updateThemeName( theme );
         }
+        if ( theme.id == m_preselect )
+        {
+            const QSignalBlocker b( theme.widget->button() );
+            theme.widget->button()->setChecked( true );
+        }
         ++c;
     }
 }
diff --git a/src/modules/plasmalnf/PlasmaLnfPage.h b/src/modules/plasmalnf/PlasmaLnfPage.h
index e489e99a7..49a6ff69a 100644
--- a/src/modules/plasmalnf/PlasmaLnfPage.h
+++ b/src/modules/plasmalnf/PlasmaLnfPage.h
@@ -46,10 +46,17 @@ public:
     explicit PlasmaLnfPage( QWidget* parent = nullptr );
 
     void setLnfPath( const QString& path );
-    /** @brief enable only the listed themes. */
-    void setEnabledThemes( const ThemeInfoList& themes );
+    /** @brief enable only the listed themes.
+     *
+     * Shows the listed @p themes with full information (e.g. screenshot).
+     * If @p showAll is true, then also show all installed themes
+     * not explicitly listed (without a screenshot).
+     */
+    void setEnabledThemes( const ThemeInfoList& themes, bool showAll );
     /** @brief enable all installed plasma themes. */
     void setEnabledThemesAll();
+    /** @brief set which theme is to be preselected. */
+    void setPreselect( const QString& id );
 
 signals:
     void plasmaThemeSelected( const QString& id );
@@ -64,6 +71,8 @@ private:
 
     Ui::PlasmaLnfPage* ui;
     QString m_lnfPath;
+    QString m_preselect;
+    bool m_showAll;  // If true, don't winnow according to enabledThemes
     ThemeInfoList m_enabledThemes;
 
     QButtonGroup *m_buttonGroup;
diff --git a/src/modules/plasmalnf/PlasmaLnfViewStep.cpp b/src/modules/plasmalnf/PlasmaLnfViewStep.cpp
index db8529d56..498a40fe0 100644
--- a/src/modules/plasmalnf/PlasmaLnfViewStep.cpp
+++ b/src/modules/plasmalnf/PlasmaLnfViewStep.cpp
@@ -26,8 +26,25 @@
 #include <QProcess>
 #include <QVariantMap>
 
+#ifdef WITH_KCONFIG
+#include <KConfigGroup>
+#include <KSharedConfig>
+#endif
+
 CALAMARES_PLUGIN_FACTORY_DEFINITION( PlasmaLnfViewStepFactory, registerPlugin<PlasmaLnfViewStep>(); )
 
+static QString
+currentPlasmaTheme()
+{
+#ifdef WITH_KCONFIG
+    KConfigGroup cg( KSharedConfig::openConfig( QStringLiteral( "kdeglobals" ) ), "KDE" );
+    return cg.readEntry( "LookAndFeelPackage", QString() );
+#else
+    cWarning() << "No KConfig support, cannot determine Plasma theme.";
+    return QString();
+#endif
+}
+
 PlasmaLnfViewStep::PlasmaLnfViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
     , m_widget( new PlasmaLnfPage )
@@ -137,10 +154,22 @@ PlasmaLnfViewStep::setConfigurationMap( const QVariantMap& configurationMap )
         liveUser = configurationMap.value( "liveuser" ).toString();
     m_liveUser = liveUser;
 
+    QString preselect;
+    if ( configurationMap.contains( "preselect" ) && configurationMap.value( "preselect" ).type() == QVariant::String )
+        preselect = configurationMap.value( "preselect" ).toString();
+    if ( preselect == QStringLiteral( "*" ) )
+        preselect = currentPlasmaTheme();
+    if ( !preselect.isEmpty() )
+        m_widget->setPreselect( preselect );
+
+    bool showAll( false );
+    if ( configurationMap.contains( "showAll" ) && configurationMap.value( "showAll" ).type() == QVariant::Bool )
+        showAll = configurationMap.value( "showAll" ).toBool();
+
     if ( configurationMap.contains( "themes" ) &&
         configurationMap.value( "themes" ).type() == QVariant::List )
     {
-        ThemeInfoList allThemes;
+        ThemeInfoList listedThemes;
         auto themeList = configurationMap.value( "themes" ).toList();
         // Create the ThemInfo objects for the listed themes; information
         // about the themes from Plasma (e.g. human-readable name and description)
@@ -149,14 +178,14 @@ PlasmaLnfViewStep::setConfigurationMap( const QVariantMap& configurationMap )
             if ( i.type() == QVariant::Map )
             {
                 auto iv = i.toMap();
-                allThemes.append( ThemeInfo( iv.value( "theme" ).toString(), iv.value( "image" ).toString() ) );
+                listedThemes.append( ThemeInfo( iv.value( "theme" ).toString(), iv.value( "image" ).toString() ) );
             }
             else if ( i.type() == QVariant::String )
-                allThemes.append( ThemeInfo( i.toString() ) );
+                listedThemes.append( ThemeInfo( i.toString() ) );
 
-        if ( allThemes.length() == 1 )
+        if ( listedThemes.length() == 1 )
             cDebug() << "WARNING: only one theme enabled in plasmalnf";
-        m_widget->setEnabledThemes( allThemes );
+        m_widget->setEnabledThemes( listedThemes, showAll );
     }
     else
         m_widget->setEnabledThemesAll();  // All of them
diff --git a/src/modules/plasmalnf/PlasmaLnfViewStep.h b/src/modules/plasmalnf/PlasmaLnfViewStep.h
index 7fcfc50cc..1fa4139e1 100644
--- a/src/modules/plasmalnf/PlasmaLnfViewStep.h
+++ b/src/modules/plasmalnf/PlasmaLnfViewStep.h
@@ -61,9 +61,9 @@ public slots:
 
 private:
     PlasmaLnfPage* m_widget;
-    QString m_lnfPath;
-    QString m_themeId;
-    QString m_liveUser;
+    QString m_lnfPath;  // Path to the lnf tool
+    QString m_themeId;  // Id of selected theme
+    QString m_liveUser; // Name of the live user (for OEM mode)
 };
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( PlasmaLnfViewStepFactory )
diff --git a/src/modules/plasmalnf/ThemeWidget.cpp b/src/modules/plasmalnf/ThemeWidget.cpp
index 28e01c2ff..68a8c5f83 100644
--- a/src/modules/plasmalnf/ThemeWidget.cpp
+++ b/src/modules/plasmalnf/ThemeWidget.cpp
@@ -62,7 +62,7 @@ ThemeWidget::ThemeWidget(const ThemeInfo& info, QWidget* parent)
     layout->addWidget( image_label, 1 );
     layout->addWidget( m_description, 3 );
 
-    connect( m_check, &QRadioButton::clicked, this, &ThemeWidget::clicked );
+    connect( m_check, &QRadioButton::toggled, this, &ThemeWidget::clicked );
 }
 
 void
diff --git a/src/modules/plasmalnf/plasmalnf.conf b/src/modules/plasmalnf/plasmalnf.conf
index aa9865117..a3a80fcff 100644
--- a/src/modules/plasmalnf/plasmalnf.conf
+++ b/src/modules/plasmalnf/plasmalnf.conf
@@ -13,8 +13,9 @@ lnftool:	"/usr/bin/lookandfeeltool"
 
 # You can limit the list of Plasma look-and-feel themes by listing ids
 # here. If this key is not present, all of the installed themes are listed.
-# If the key is present, only installed themes that are *also* included
-# in the list are shown (could be none!).
+# If the key is present, only installed themes that are **also** included
+# in the list are shown (could be none!). See the *showAll* key, below,
+# to change that.
 #
 # Themes may be listed by id, (e.g. fluffy-bunny, below) or as a theme
 # and an image (e.g. breeze) which will be used to show a screenshot.
@@ -27,3 +28,26 @@ themes:
     - theme: org.kde.breezedark.desktop
       image: "breeze-dark.png"
     - org.kde.fluffy-bunny.desktop
+
+# If *showAll* is true, then all installed themes are shown in the
+# UI for selection, even if they are not listed in *themes*. This
+# allows selection of all themes even while not all of them are
+# listed in *themes* -- which is useful to show screenshots for those
+# you do have a screenshot for.
+showAll: false
+
+# You can pre-select one of the themes; it is not applied
+# immediately, but its radio-button is switched on to indicate
+# that that is the theme (that is most likely) currently in use.
+# Do this only on Live images where you are reasonably sure
+# that the user is not going to change the theme out from under
+# themselves before running the installer.
+#
+# If this key is present, its value should be the id of the theme
+# which should be pre-selected. If absent, empty, or the pre-selected
+# theme is not found on the live system, no theme will be pre-selected.
+#
+# As a special setting, use "*", to try to find the currently-
+# selected theme by reading the Plasma configuration. This requires
+# KF5::Config at build- and run-time.
+preselect: "*"
diff --git a/src/modules/welcome/welcome.conf b/src/modules/welcome/welcome.conf
index 18e71b1ef..b7ce5cfcd 100644
--- a/src/modules/welcome/welcome.conf
+++ b/src/modules/welcome/welcome.conf
@@ -25,6 +25,6 @@ requirements:
     # If any of these conditions are not met, the user cannot
     # continue past the welcome page.
     required:
-        - storage
+        # - storage
         - ram
-        - root
+        # - root