Geany 0.15, Windows XP, GTK+ 2.14.7, GLib 2.18.4
Some dialogs cause Geany main screen updates to stop. Color Chooser, and most file open and file browse dialogs within preferences. Open color chooser, then move its window (or any other window) across Geany main windows. Also open Preferences->Tools->any file open dialog. Happens every time.