Yesterday I was working with my 19″ samsung monitor plugged in my macbook. It works flawlessly, absolutely no problems…. until I put it to sleep, unplug the monitor and wake it up.
What happens is that the windows that were on the secondary display won’t be shown by exposé and it is really a pain to get it working normally after that. I had to hide the window and call it again otherwise it was lost somewhere.
Since I got about five windows that I was still needing to use and exposé was messing up with them I opted for rebooting to save some time.
Hope it gets fixed soon.