VLC Forum gives this.
Just wanted to say i have been using VLC for a while now and its great as it plays everything you throw at it...so far anyway.
anyway im using Windows7 64bit and VLC didnt work properly at first until i right clicked on the .exe clicked properties and selected comaptability..then just selected Windows XP mode and ive had no issues with it since then. Maybe its the same for Vista (never used vista so i dont know). Ohh im using the 1.0.2 version