full screen stripes
 

when playing a video in full screen, i see the overlay in a pink shade (and not black as i have in the past), and in addition, i can see stripes on the most left and on the most top of the video playing in the overlay "color".

the problem repeats itself on every video and when i play the same videos on another player, wmp for example, it plays just fine.

Check your video card overlay settings (color etc.)
Maybe restore them to default if you changed them (even if you didn't changed them)
Take a look also to BSplayer color control (right-click -> Color Control)