I recently purchased one of these players to mainly play back Div-X files. However, after viewing a couple files, it would appear that the Div-X playback is pretty ropey... the image appears to be very jerky. After reading a few threads on here that reported that the playback would be smoother after a firmware upgrade, I tried to use the firmware file from AV Land, but with no success - probably because it is meant for the 575 So I phoned Pioneer today to ask if I could have a firmware disc sent to me. During the conversation, I was told that the firmware would only add the subtitle feature to Div-X, and would remove any multi-region feature from the player - something I didn't think was true. If I am just going to use the player for Div-X, am I probably better off just returning the player and purchasing a different one, or is there any way of improving it's performance with MPEG4 files? I'm fairly pleased with the player otherwise... the only other gripe being the fact you can't set the output of the scart to RGB at the same time as having component selected, but that's jsut a small thing!