"disapearing" error windows

[stan]

For quite some time now my Ubuntu worksations has been exhibiting an extremly
anoyig behavior. When a error dialog widow pos up, it is either invislble,
or so light that I cannot se it, untill the mouse happens to cross it, at
which time it appears at full brightness.

Up untill now, I have ust been living with this. But, this morning a RDP
session timed out whule I was away from the machine. This made teh
keyboard, and mouse clicks appear o be non fucntionsl. I came really close
to rebooting the machine to solve this problem, before teh mouse acidently
moved over the error dialog.

How can I defeat this behavior?
-- 
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