GtkFixed / images / redraw problem

Hi all, I've got some fairly reproducible bugs, but I'm not sure where the root cause may lie :-( The code I'm using can be seen at http://www.gornall.net/choose_db.txt , because it's about 200 lines... The widgets work great, until you pull down the GtkCombo, at which point all the labels will disappear. I've tried to put in /******************************************************************\ |* Callback : Handle a selection \******************************************************************/ function select_cb($list, $listitem) { $this->setSelectedIndex($list->child_position($listitem)); // This because it seems to lose the GtkLabels otherwise! $this->window->hide(); $this->window->show(); while (gtk::events_pending()) gtk::main_iteration(); } ... as a callback, and indeed this works some of the time, but most of the time, you get a flashing display (you can see the labels draw) then the image repaints over them.... I was using the image-in-a-GtkFixed as a poor-mans background-pixmap, since I couldn't see any other way of superimposing one widget on top of another. Any ideas? Alternatively, any better ways of doing a background pixmap welcomed also :-)) TIA, Simon