For some reason, periodically when I select a menu command, the command label gets "stuck" on the screen and won't go away. I can close all open applications, including whichever one I was using when it got stuck, but it still won't go away. In the screenshot below, I opened an new instance of IE just to show how the label stays on top. The label was not created by this instance of IE.

Edit with the source: The label that gets stuck is the first menu command I select in IE. If a label is already stuck, a new one does not get stuck (regardless of which instance(s) of IE are involved). Based on this knowledge, I now just open IE on my secondary monitor, carefully open the context menu so the Properties command is in the bottom corner, and click it. This is not a solution...

The label never moves and is transparent to mouse input (if I click it, it's as if I clicked the item behind it).

The label does not go away if I close all running applications. I haven't tried stopping services or closing system tray items like Live Mesh.

The label does go away if I change the screen resolution and then change it back.

Any ideas how I can stop this from happening? It's happened a half dozen times since yesterday and it's becoming quite disrupting to my work.

Obviously I added the circle in MS Paint. That part isn't stuck. ;)