Originally Posted by artem
User X11 applications cannot/shouldn't/aren't allowed to bring down X server even theoretically. It cannot be a Flash bug by definition.
Besides mind the sheer number of NVIDIA specific errors (from dmesg and xorg.log):
The difference between theory and praxis is, that in theory, there is no difference between theory and praxis.
I also experienced this bug, it must've been introduced in some latest 10.3 flashplayer update.
I installed Flashplayer beta 11 and this bug ( and the other flash bug where windows shine through ) seems to be gone. Lets see what does not work NOW.