Live TV progressively lagging behind real-time? (1 Viewer)

[jonm]

TV-Server Version: 1.0.1
MediaPortal Version: 1.0.1
MediaPortal Skin: Blue3wide
Windows Version: Vista Ultimate SP1
CPU Type: Intel Core2Duo 2.6Ghz
HDD: Samsung 1Tb
Memory: 2Gb DDR
Motherboard: Asus P5E-VM-HDMI
Video Card: Intel G33
Video Card Driver:
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: Blackgold 6-in-1
1. TV Card Type: DVB-S
1. TV Card Driver:
2. TV Card:
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:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:

I started watching the BBC News channel some hours ago on a client PC. I've been away for lunch and come back to the PC just now and noticed that the clock on the live TV screen was showing 13:38 whereas the PC's clock showd that it was actually 13:54. I changed channels and then changed back to BBC News and it's now back at the correct time. So, is live TV somehow progressively lagging behind real-time? (Or was there a pause which I didn't see because I wasn't here all the time it was playing?) I'm going to leave it running again now to see if the same thing happens. Has anyone else seen similar behaviour?

Thanks,

Jon.

Ahem. Looks like this was caused by me minimising MP...