Sorry, I personally cannot reproduce. (XP SP3 - Nvidia)
(Neither different imagesizes, nor such narrow (few pixels wide) column from the left on the right-hand side either) mikeggsm: re "what you see":
Frequently asked questions - BS.Player wiki mikeggsm &
darren: It might be interesting to know what videocards (and drivers) you're using.
darren: Of course both 1280 x 720 resp. 1680 x 945 are ratio 16:9
exactly, whereas your desktop resolution of 1680 x 1050 is 16:10 ratio.
(Trying to find an 'explanation' for 1266x712, I also tried if videowindow with a border or a borderless window made a difference to the effect it perhaps 'stole' a few pixels; ...but it didn't. So ???..confuzzled !)