I have tried upgrading to 4.1.2 and it didnt fix it. I also agree that the demo doesnt show the problem, but it does happen in my code. I also have 4 comboboxes on my screen and 2 of the 4 do this. Its weird that they dont all do it. I tried converting to the alternate style using checkboxes. It doesnt happen when I use them. So I guess I’ll switch to that style.