I also use AVG, and I got the same message as saron, and I downloaded it from myibay site (what the heck are warez forums?).
This started happening after a recent AVG signature database update. Before that it was fine. I trust that myibay software is OK, and that this is a false positive, however if I were myibay, I would install AVG and check why this is happening. It would be a shame that this drives away users from such a useful service.