Tooltips no longer showing

[doubledoh]

Hi,

My tooltips are no longer showing for anything. I love this interface, but tooltips are kind of essential when sorting out items. What if anything have I done wrong? Is there a quick fix?

I do get a message the first time tooltips are supposed to work that says that the UI needs to be updated. Then any rollovers that are supposed to result in tooltips just don't work.

Thanks for your help ahead of time.