Videotexture + picvideo - strange behavior

hi,

I stumbled over a strange problem while playing back a pic mjpeg compressed videofile. the file is playing with a black screen, sound is all right. when I tweak contast and brightness at videotexture the image appears…when I switch to fullscreen mode, black again.

is this a colorspace problem??? picvideo should be YUV. I´ve tried all fullscreenformats…

I´m on win7 + beta25.1 + ati firegl gfx

…it´s videotexture yuv mixing mode - sorry for this beginner spam…