[Gtk-sharp-list] Problem: windows get "empty"

[Julien Sobrier]

Hello,
I have a window with a balk background, with a couple of widgets
(labels, hbox, vbox, etc.) After a while, the widgets are not "redrawed"
as needed. For example, if I put a new window in front of part of my
window, the area hided are left black after i remove the window on the
front. If I switch my window to th background (behind other windows),
then it is all black when I put it back on top. This only happens after
a couple of minutes. I wonder what could cause this.

Any direction to look into?

Thank you
Julien