Emulator

ive had this a long time and wondered why it was never listed as an issue,
but ive seen some others complaining about it on irc, etc. ive started to
track down why its not so widespread and its because certain criteria must
be met.
if you use the same fullscreen and window resolutions and change from
either windowed to fullscreen, or fullscreen to windowed, you get a black
screen.
this isnt for all resolutions either. ones ive tested that do it are:
1280x720 and 1360x768. there may be more.