Another, possibly related test:
1. flash plugin in firefox
2. right-click context-menu -> settings
3. try to click "close"
there are 3 possibilities:
1. works fine
2. replayed click ignored, second one works - if wm releases grab
3. click never works - if wm doesn't release grab
Another, possibly related test:
1. flash plugin in firefox
2. right-click context-menu -> settings
3. try to click "close"
there are 3 possibilities:
1. works fine
2. replayed click ignored, second one works - if wm releases grab
3. click never works - if wm doesn't release grab