Gnome 3 DE stops loading after upgrade to kernel 2.6.40-4.fc15.x86_64
After a standard upate of various packages (using gui update manager), including new kernel 2.6.40-4.fc15.x86_64 last night, my FC15 won't complete loading Gnome 3 when booting up. It loads the wallpaper, and mouse function appears normal, but not the title bar or the Activities panel (and it doesn't appear when I move cursor upper left). I am able to open a console with ctrl-alt-F2 and gracefully reboot.
It does boot normally into the previous kernel (188.8.131.52-35) but graphics seem considerably slower than before the update.
My video card is an hd4650 with standard (free) Radeon driver.
Anyone else having any problems with the kernel update?