diff --git a/openlp/core/ui/mainwindow.py b/openlp/core/ui/mainwindow.py
index d9bd364f9..07e189fda 100644
--- a/openlp/core/ui/mainwindow.py
+++ b/openlp/core/ui/mainwindow.py
@@ -536,9 +536,6 @@ class MainWindow(QtGui.QMainWindow, Ui_MainWindow):
         Registry().register_function(u'openlp_version_check', self.version_notice)
         Registry().register_function(u'config_screen_changed', self.screen_changed)
         self.renderer = Renderer()
-        # Create the displays as all necessary components are loaded.
-        self.preview_controller.screenSizeChanged()
-        self.live_controller.screenSizeChanged()
         log.info(u'Load data from Settings')
         if Settings().value(u'advanced/save current plugin'):
             savedPlugin = Settings().value(u'advanced/current media plugin')
diff --git a/openlp/core/ui/media/mediacontroller.py b/openlp/core/ui/media/mediacontroller.py
index 301e48f1a..eaa802c21 100644
--- a/openlp/core/ui/media/mediacontroller.py
+++ b/openlp/core/ui/media/mediacontroller.py
@@ -309,7 +309,7 @@ class MediaController(object):
 
     def setup_display(self, display, preview):
         """
-        After a new display is configured, all media related widget will be
+        After a new display is configured, all media related widgets will be
         created too
 
         ``display``
diff --git a/openlp/core/ui/slidecontroller.py b/openlp/core/ui/slidecontroller.py
index 9287c6f12..5cad8b1cd 100644
--- a/openlp/core/ui/slidecontroller.py
+++ b/openlp/core/ui/slidecontroller.py
@@ -87,6 +87,7 @@ class SlideController(DisplayController):
         Set up the Slide Controller.
         """
         DisplayController.__init__(self, parent, isLive)
+        Registry().register_function(u'bootstrap_post_set_up', self.screenSizeChanged)
         self.screens = ScreenList()
         try:
             self.ratio = float(self.screens.current[u'size'].width()) / float(self.screens.current[u'size'].height())
diff --git a/openlp/core/ui/thememanager.py b/openlp/core/ui/thememanager.py
index db97e74a6..6c9af22fc 100644
--- a/openlp/core/ui/thememanager.py
+++ b/openlp/core/ui/thememanager.py
@@ -405,7 +405,7 @@ class ThemeManager(QtGui.QWidget):
             theme_file = os.path.join(self.path, theme_file)
             self.unzip_theme(theme_file, self.path)
             delete_file(theme_file)
-        files = AppLocation.get_files(self.settingsSection, u'.otz')
+        files = AppLocation.get_files(self.settingsSection, u'.png')
         # No themes have been found so create one
         if not files:
             theme = ThemeXML()