Thank you, Qev. Dang. Why would a bittorent client (or any client for that matter) be spoofing IP addresses??? The only reasons I can think of for bogus IP addresses being generated are malicious in nature (since any return traffic would never find its way back to my network, obviously).
Any thoughts on debugging this, anyone? I do online banking and other such sensitive activities from home, and I thought I was locked down pretty tight, but this one has me quite concerned! I realize that this is veering away from the purpose of this forum if this is not in fact a router anomaly, but maybe someone out there has some useful ideas...
FWIW, I don't run ANY peer to peer apps, or at least I thought I didn't!