Sorry, no. I always spot them after the fact.

Since my post I have learned of a similar Windows 7 bug, and have turned off some features of the UI in an attempt to avoid it. So it may not be a Dexpot issue at all. It sure would be nice to have a way to get rid of these things.

I'm seeing this on 1.6.9 build 2285, and didn't find anything recent on the forums. I'd really like a way of getting rid of them. At the moment my Desktop #1 has "Waiting for cache..." in the corner. Fortunately it appears under other windows. I had something the other day that was on top!...