window title bars disappear

[Roger Searle]

Good morning, on a random basis, not too frequently, and unrelated to 
anything I can put my finger on, the title bars of all windows on my 
gnome desktop (ubuntu 8.10) are missing.  This will happen on logging 
in, I can't say if logging out and back in, or restarting X prior to 
logging back in fixes it, since each time it happens (iirc) and I log 
out to try, I get an unresponsive system that has to be power cycled, as 
did happen today.

It's somewhat annoying, and am wondering if anyone has experienced this 
and know of the cure.  Compiz is running, I've not located a setting 
that seems to have an impact on this and will rectify.  Perhaps it's 
just a little buggy and is as good as it gets for now . . .

Cheers,
Roger