ran the command line, as suggested in report immediately above.
left the browser open overnight so i would not forget to execute from the
command line; my memory just doesn't function like it should, but i keep
forgetting that.
bug occurred within the first few minutes this morning.
one tab
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.11) Gecko/20071204 Ubuntu/7.10
(gutsy) Firefox/2.0.0.11
linux newbie.
i don't believe the freeze/gray issue happened initially (upon ubuntu install),
more of a recent development.
killed google toolbar search (due to comments within this bug