When one of my extenders (360 or Linksys DMA 2200) connects to my Mediacenter, a message will randomly pop up on the PC screen and the extender screen.

 "Message from the TV Service Provider".  I can't click on ok to get get message to go away.  The only way to get rid of it is to end task on ehshell.exe and reboot the extenders.   Any ideas?

Screenshot of the error here:

http://www.flickr.com/photos/73306819@N00/4100202641/

 I use to get that all the time too.  I am not sure what can be done about it as it seems to be coming from the Cable Provider.  I have not seen it again since upgrading my ATI DCT's to the 1.19 firmware.  Have you upgraded yet?

I have applied the firmware.  I'm in San Diego with Time Warner.  It only happens when my extenders connect though.