Sudden 'Interlacing' Problem - Australia

[S.O.P]

TV-Server Version: MyTV Engine 0.2
MediaPortal Version: 2.3.0 RC1
MediaPortal Skin: Blue Two Wide
Windows Version: XP SP2
CPU Type: A64 3200+
HDD: Couple of them
Memory: 1gig OCZ Plat Rev2
MotherboardFI Ultra-D
Motherboard Chipset: NF4
Motherboard Bios: Custom
Video Card: 7900GS
Video Card Driver: Can't remember
Sound Card: Audigy2
Sound Card AC3:
Sound Card Driver:
1. TV Card: Digitalnow Dual Digital
1. TV Card Type: DVD-T http://digitalnow.com.au/product_pages/DualDigital.html
MPEG2 Video Codec: Nvidia
MPEG2 Audio Codec: Nvidia
Satelite/CableTV Provider:
HTPC Case: LC14M
Cooling: XP90
Power Supply: Tagan 650
Remote: iMON
TV: Dell 2407
TV - HTPC Connection: DVI


Been running several SVNs of MediaPortal for the past 4-5 months with nary a problem (besides tv guides) when suddenly I start getting this odd picture on a few channels.



Its not only Channel 7 that does it, Channel 2 and SBS also which I have narrowed down to being SD channels, BUT, only in full screen mode(7HD suffers the 'interlacing' problem also). Windowed seems fine though I don't like to resize as it takes forever.

Now this is only a recent occurrence, it was working fine for the previous months. I wondered if it happened during a late night install of a svn so I decided to switch to RC1 with a fresh install and the problem still exists. No other known changes, software or hardware.

Any ideas of what it could be? Or settings I could try?

Here is a pic of it normal:



And a pic windowed:




Edit: Forgot to mention, other TV software is fine in full screen mode. This problem appears to be MP specific.


Fixed: While it was MP specific, the problem was AA and AF that was enabled in the video card settings.