I Upgraded 10.10 to 11.04 on last friday.
My lap is - NEC VersaPro VY11F/BH-T.

I browsed internet using firefox and chrome without any prob. but when i was working with GIMP, lap was stuck.

i faced to this problem many more times on default 'ubuntu' session and 'ubuntu classic' session too.

at the last i pressed power button....
after that i lost left and top panels on default Ubuntu session. (Alt+F2 also was not working and other shortcuts too..)

but when i am in 'Ubuntu Classic' session, panels(top & bottom) are ok.

My Problems -
1. I want to get back top & left panel on default 'Ubuntu' session
2. and i want to work on GIMP without stuck on both sessions.

Please help me. thanks