Thanks, disabling Overlay Video Output worked for me.Disable overlay video output or make you you don't have video mirroring (NVIDIA) or theater mode (ATI) in use.It seems like version 0.9.8a will open the opposite monitor in fullscreen automatically
http://wiki.videolan.org/WindowsFAQ#Why ... _output.3F
Although, strangely, I cannot now run full screen on the other display unless I enable it again - LOL
Will try one of the nightlies.
EDIT:
YEP, that fixed it.