Keeping the drop-down visible for a Choice, I am pressing ALT+TAB and selecting a different application, say a command prompt. This results in an ItemEvent being triggered for Choice for an item which already remains selected.

This is reproducible atleast since 1.4.2 on WinXP. Not reproducible on XToolkit where pressing ALT+TAB does not have any effect.

I have attached a sample test. Execute the sample test. Click on Choice. Once the drop-down is visible, try pressing ALT+TAB and choose a different application. If you see an ItemEvent on the console, the bug is reproduced.