Wow... I am unable to switch wallpapers... what is up with Lion...
I got a new 13" MBP about a week ago and I haven't had this problem. I can change my background just fine. Has anybody had this problem with a MacBook Pro?
yep had this problem briefly with my 2010 15". I would set the background and it would be shown as changed in the settings, but no change would occur. A restart fixed the problem. Had it happen to me couple more times and since then its been fine.
This ranks right up there with the instant screensaver which just randomly kicks in mid work (or even mid sentence- just did it to me as i was typing this), no matter what you change the settings to or delete the screensaver plists. Clean install is in order I believe.
Maybe it's a problem with Lion and older hardware?