Hot corners have stopped working for no apparent reason.

[snaky69]

It's done it twice so far, once yesterday when the dock also became unresponsive, only a hard reboot would fixe the issue, I couldn't even use the apple menu to restart the computer.

Just now hot corners have stopped working completely. The only difference from 5 minutes ago is that I disconnected my external display, and installed flash player 10.1 pre-release.

Any suggestions? I'm using both the trackpad and a bluetooth might mouse, both do not trigger my hot corners.


Edit: I plugged my external back in and unplugged it again, and now everything works. Odd.

 

[takamine]

I usually get this problem when plugging and/or unplugging my external monitor too. Usually fixed by opening up Terminal and typing:

killall Dock

Works for me, so hopefully it works for you!