Camera unable to rotate. Blender Jedi Wanted!

I have a Blender student that is unable to rotate his camera. I’ve tried deleting it and adding a new one. In the end, it still doesn’t rotate. We are waiting for the school IT to update Blender to 2.61. The student is currently working on 2.57.

you can update blender yourself it doesnt have to be installed just put the files where they go

Have you locked the camera rotation (padlock buttons next to its rotation value)
or most likely
Have you enabled the ‘Manipulate Center Points’ button on the 3d view header (3 dots with a double headed arrow)