I have a password type field on a form. Windows will not let you copy it to the clipboard and pops up an automatic little window that looks like a tool tip that says you cannot copy password fields. When you close the tool tip all of the controls on the form are erased as well as the form background. This is a tabbed form on this application.
Anything that forces a redraw of the form (minimize/maximize) will redraw it all correctly. If you tab from field to field only the text is repainted.
Not a problem but you might want to fix it in a future release.
I am using the new 2.6 FF.
Sounds like an XP thing. I had the same problem with the new tooltip/balloons that popup when caps is on or letters are typed in a number only box. Frames and such redraw funny too.