When I upgraded to wp3.5 nothing showed in the header where the images were supposed to be. I checked the header widget and the rotator code wasn't there so I added it..
When I refreshed the page the images showed up but the rest of the site, below the header was blanked out. Fortunately this was done on a test site backup.
When I removed the rotator code the rest of the site started working as normal again but the images were removed.
test site located at test.rockinmobile.com