0.2.3 rc1: problem when changing channel

[daHive]

TV-Server Version: 0.3
MediaPortal Version: 0.2.3 rc1
MediaPortal Skin: blue2 wide
Windows Version: xpmce
CPU Type: intel c2d
HDD: 250g
Memory: 1gig
Video Card: geforce 7600
Video Card Driver:
Sound Card: onboard
Sound Card AC3: onboard
Sound Card Driver:
1. TV Card: avermedia dvb-t
1. TV Card Type: hybrid
1. TV Card Driver:
2. TV Card: haupauge hvr4000
2. TV Card Type: hybrid
2. TV Card Driver:
MPEG2 Video Codec: nvidia,ffdshow
MPEG2 Audio Codec: nvidia,ffdshow

hi,

i just changed from 0.2.2 with tv3 to 0.2.3 with tv3 and have a problem with changing channels:
most of the times when i change the channel the screen goes either black or freezes at the last frame of the old channel for about 10 seconds, while the audio switches to the new channel immediately. when the video "arrives" it runs fast to catch up to the audio.
at first i thought it was a codec thing, so i changed around(nvidia, ffshow, mpv) but the problem persists.
changing channels before(with 0.2.2&tv3) worked within a second or two(on the same card of course).

any help would be appreciated!