diff --git a/lib/rabbit/renderer/display/drawing-area-base.rb b/lib/rabbit/renderer/display/drawing-area-base.rb
index 6543a7b9..54d69cb7 100644
--- a/lib/rabbit/renderer/display/drawing-area-base.rb
+++ b/lib/rabbit/renderer/display/drawing-area-base.rb
@@ -54,6 +54,10 @@ def initialize(canvas)
         end
 
         def update_size(width, height)
+          # With GTK 3, Frame calls this on every configure-event, which is
+          # also emitted for moves and restacks. Reloading the theme
+          # re-applies it to all slides, so skip it for an unchanged size.
+          return if @real_width == width and @real_height == height
           super
           @mask = nil
           set_hole