I recently downloaded 11.10 and demoed on the Live CD. Snapping worked great.
After installing snapping no longer works. I tried recreating my home directory from
/etc/skel as well as creating a new user to make sure it wasn't a local problem. No luck. I also tried reinstalling which didn't help. Nor did installing all
wmctrl packages and reloading Compiz.
Edit - 1: I installed
CompizConfig Settings Manager but nothing jumped out at me to change.
What might have changed between the LiveCD and the installation?
Edit - 2: After continuing to look for a solution I've realized my terms don't mean what I meant them to. By snapping I mean the feature termed Aerosnap in MS Windows where dragging a window to the left/right/top of desktop will cause the window to be sized to fill the left half/right half/all of the screen.
Edit:This install is running on a Dell E6420 with a nVidia Corporation GF108 [Quadro NVS 4200M] Video card. I am selecting "Ubuntu" on the login screen but end up with unity-2d-panel and unity-2d-launcher processes running upon login.