When Slingplayer 2.0 is in normal window mode, the window can only be reduced to about 500x500 (or something like that.).   It looks to be a little less then 1/4 of my 1600x1200 screen.   Even though there are arrows in the bottom right corner of the window, the window won't get any smaller.

 If I change the view/Display Mode/Video Only (skinless), then the window will shrink further.