tv screen not centralized

bsplayer works just fine except this minor thing, on tv-screen picture is not centralized. it bugs me because subtitles go over that vertical limit where picture(motion) stops. i haven´t seen this kind of problem in any other viewing programs. i use ati radeon 9000 pro and winxp, this problem only happens if\when i´m using theatre mode(ati´s overlay "mode").

i can´t move screen on tv-properties enough so i can´t make this issue go away.