Unable to play Mpeg2 TS file after installing MP SVN

[VicBond007]

MediaPortal Version: 0.2.3.0 SVN released on 2/20/2008
MediaPortal Skin: BlueTwo / Foofraw
Windows Version: Windows XP SP2
CPU Type: Pentium M 1.8GHz / Core2Duo e6300
HDD: 2.5" IDE 40GB / 3.5" SATA 1000GB x 4
Memory: 1GB PC2700 / 1GB PC26400
Motherboard: Dell Latitude D610 / MSI P965 Platinum
Motherboard Chipset: Dunno / Intel P965
Video Card: Intel GMA915 / NVidia 8500GT
MPEG2 Video Codec: MPV Filter / FFDshow December Tryout / Cyberlink PDVD 7.x
MPEG2 Audio Codec: MPA Filter / FFDShow December Tryout
HTPC Case: Zalman HD135
Cooling: Mad fans yo
TV - HTPC Connection: Internal LCD monitor / External CRT display on YPrPb

Hi all. After weeks of fussing with MP I'm down to only one glaring problem (though I'm sure that I'll create more soon!).

When trying to play an mpeg2 .ts stream in Media Portal using the 2/20/2008 SVN build, the screen will pause for a second (Like it does when you try to play an h.264 .mkv file without the proper splitter/codec installed) and then I am "returned" to the menu I was just on. With a clean install of Media Portal, this does not happen, and my stream plays fine with hdtvpump installed. I address this problem as being in the 2/20/2008 build, however it's more than likely that it started with an earlier build. I haven't the time to test every one to see when this feature breaks. I have duplicated the bug on both my laptop, and my htpc, which have very different hardware/software configurations, and since it used to work, but doesn't as soon as the SVN is installed, I'm fairly sure the fault lies with MediaPortal.

PS: The test file that I'm using is available from the DVB Portal website at the following address:
http://dvbportal.dyn1.de/get.php?file=hilary.zip