I'm using VLC v2.0.2 on a MacBook Pro 17" with OS X 10.7.4 but I had this problem with earlier versions, I think.
Basically, when VLC is playing in a window as opposed to full screen, the FF and REW buttons at the bottom left of the window do not work as they should, pressing either of them simply returns the playhead to the beginning of the media file.
In full screen the control buttons work perfectly well.
This is particularly annoying because I often have to reduce the player to a window to find a particular place in a file but can only stab about on the playback bar.
I've tried deleting the VLC preferences etc. but nothing seems to work.
Is this a 'feature' or am I alone with this problem?