Screen blanks out 7.10

[Rajiv Vyas]

If I open too many programs (right now I am running firestarter,
OpenOffice, Firefox, Google Desktop and Evolution) then new windows I
open in OO, Evolution or a new program starts blanking out. So, for
instance, when I was trying to reply to a message in Evolution, the
reply window was dark and I couldn't see anything. The same thing
would happen if I opened a text document in OO or for that matter
Gedit. Any suggestions.

Thanks,