I just transcoded an AC3 AVI file to low-res DVD in TMPGEnc. Now I have a little square made up of 9 smaller squares jumping around the playback screen on the MPEG file. It wasn't in the AVI just the transcoded MPEG. It looks like a representation of the number pad (just the 1-9 keys) on your keyboard. What is it and how do I get rid of it?