Cannot step more than 6 frames
 

Bsplayer: V 2.52 build 1031.28 Mar 2010
Video card: S3 Graphics ProSavage DDR
DirectX; 9.0c
Gspot: Codecs are installed
Bsplayer Video Decoder: ffdshow
Seek by keyframe...: unticked
Rendering: Internal render direct draw surface
AVI file: Length 1.268 secs, 38 frames

Use bsplayer to open the file with bsplayer set to Repeat: all
Video displays repetively
Hit C key: video stops (just where does bsplayer tell us to use the C key?)
Hit right arrow n times: After 6th keystroke, display stalls.
Click Play/Pause: Video completes to end at about half previous speed, then continues to repeat at half speed, but this time never reaches the end, restarting when about 10-20% from the end of the video.

Cannot confirm behaviour as I don't have ffdshow. But can confirm that after about 550 frames, arrows are not working anymore. AVI file decoded by 7's built-in MPEG4 decoder.