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.

Do you know which program the tooltips belong to?

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! These artifacts stay on their appropriate desktop.

This is on Windows 7, with 2 monitors. Always on the secondary monitor so far.