CBS-58 HD Weirdness

[SRW1000]

In a nutshell:  when viewing channel 46-1 via s-video, the picture's tint seems to fluctuate a few times a second, going from yellowish/green to pinkish/purple.  This is especially noticeable in people's faces.  I don't see this on any other stations, including 46-2.

I've got my Sylvania HDTV receiver's s-video going to my Panasonic DVD/DVR, with that s-video connection then going to my Toshiba 32" SDTV.  If I switch to component output going directly to my TV (480i) or to my projector (1080i), I don't see this phenomenon.

Could this be macrovision?  I really don't want to have to get a video processor just to record shows off of CBS for later viewing or archiving.

Has anyone else noticed this?  I don't think it's the Sylvania receiver, since this doesn't happen with any other stations.  I did a search, but didn't find anyone else with this problem.

Scott