TV Server unstable in RC6 (1 Viewer)

[mars]

MediaPortal Version: 1.1.0 RC6
MediaPortal Skin: BleazzleWide
Windows Version: XP32 (TV Server) / W7-64 (MP Client)
CPU Type: Intel DualCore
HDD: SAMSUNG 250GB
Memory: 4GB
Motherboard: GigaByte GA-73PVM-S2H DDRII 800
Video Card: Nvidia 9600 GT
Video Card Driver: latest
Sound Card: built-in
Sound Card AC3: optical out
Sound Card Driver: latest
1. TV Card: FloppyDTV
1. TV Card Type: DVB-C
1. TV Card Driver: latest
2. TV Card: Hauppauge Nova T-500
2. TV Card Type: DVB-T Dual
2. TV Card Driver: latest
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: MPC
MPEG2 Audio Codec: MPC
h.264 Video Codec: MS DTV
Satelite/CableTV Provider: Unitymedia
HTPC Case: LIAN LI
Cooling:
Power Supply: Enermax EG365AX-VE
Remote: LT Harmony 555
TV: LG LC42
TV - HTPC Connection: Sub-D

Have installed RC 6 on a clean Win7 machine that connects over IP to TV Server running on a clean XP32 system.
I am observing that TV server.exe is unstable since RC1 and unfortunately this has never changed up to RC6.
The symptomns are that either TVserver is suddenly terminating or still seems to run, but does no longer respond to MP requests. It sometimes happen after 15 minutes when watching HD stations or when switching between channels or (mostly) when there is no action (because MP client is in standby). When MP client is resuming it can't connect to TV Server.

The XP machine, TVserver is running on, is not going into standby at any time.

Is instability of TVserver.exe a known bug and ifso, is there a workaround ?
Logs attached

 

[jrwcarroll]

I have the same problem with a similar set up although I have a local client on the XP32 box. I have also noticed the same problem when I log out of MP surf the web and then log back in

 

[elliottmc]

One common factor for these problems seems to be XP SP3.

Another thing I have noticed is that this seems to happen more with Nova-T 500 cards (there are a few other reports of similar problems). There have been known issues with the Nova-T 500 on XP, starting with SP3. I have one of these cards, and had quite a few problems (mainly BSOD) and decided to upgrade my server to Windows 7. After I did this, no problems!

Mark