I've noticed that when a panel is updated in the DMX the entire page flashes white just before you see the change. This seems to only occur in Firefox 2 as I haven't see the issue using IE7, FF3 or Sarfari .
I poked around and it seems to me that the issue is caused by the following series of javascript events:- dom modified
- setTimeout call
The page goes blank after the dom modification and isn't restored until after the setTimeout completes.
All display updates after componentart callbacks complete seem to be using this method, which is probably an unneeded work around as discribed here: http://weblogs.asp.net/in...-an-updatepanel.aspx