standing picture and play audio after channelswitch (1 Viewer)

[scirocco790]

TV-Server Version: 0.3 actual
MediaPortal Version: 02.3 RC2 actual
MediaPortal Skin: XFace
Windows Version: Windows XP SP2
CPU Type: P4 2,6Ghz
HDD: WD 160Gb
Memory: 1,5Gb DDR
Motherboard: MSI
Motherboard Chipset: SIS
Motherboard Bios:
Video Card: Ati Radeon 9600
Video Card Driver:
Sound Card: AC97
Sound Card AC3: coax out
Sound Card Driver:
1. TV Card: FireDTV DVB-S
1. TV Card Type:
1. TV Card Driver:
2. TV Card: FireDTV DVB-S
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
Satelite/CableTV Provider: Astra 19.2E
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection: VGA

since a few svn´s i often have problems with channel switching. after switching i can hear audio of the channel i´ve switched to, but i see a standing picture of the previous channel.