bsplayer freezes when seeking forward

[ashrack]

When I hold the right arrow on the keyboard for more than 5seconds BSPLAYER will freeze during rewinding.
This only happens with X264 movies that have subtitles already in them. If I disable the subtitle in HALI MEDIA SPLITTER then the seek forward works normally.
With MPC this problem doesn't exist so it is a bug in BSPLAYER.

Steps I have tried:
Installed BSPLAYER 2.26 BUILD 956, before I was using BSplayer 1.42.833
Updated to latest COREAVC from 1.5 to 1.6 and updated HAALI MEDIA SPLITTER to version dated 03/08
Removed COREAVC and installed BETA4 of FFDSHOW TRYOUTS and set it to decode H.264 video

Specs of my machine
Athlon X2 6000+
2GB RAM
Radeon HD 3850 256MB
Win XP SP2

edit:
have edited certain things that BSpeter warned me about