Yes - a few people both here and in Europe have seen it, and it seems to vary from source to source. Not sure if the latest firmware fixes it or not.
I spoke to NEC UK, and they weren't aware of it, but were willing to take my machine in to look at it. They use a high end Pioneer DVD player via scart and don't see the interference, but I've seen it from a few different players. My Alba doesn't seem to do it though.
I got the impression NEC didn't believe me, but if you ring them, then they may start to take note of the problem. See what they have to say. Try here for their phone number:
http://www.nec.co.uk/findus.asp
HTH
Gary.