Okay so I just got a Mac Pro last Saturday, been using PCs forever. I've never had any problems with quality issues when encoding a divx/xvid file to dvd on a PC, but I made a dvd in iDVD and I put two xvid files into the project to be encoded. I'd say total run time for both files combined would be about 100 minutes so it's not like I'm trying for a 4 hour DVD here. Anyways when I encode and burn the dvd the quality of movie drops alot, jagged edges everywhere. I have "Best Quality" checked in the iDVD preferences so I don't know why it's doing this. I have all proper codecs installed for divx, xvid, ac3 audio, ect. Anyone else have this problem or know how to correct it? Would it be better to put the two movies into iMovie HD and encode them with that? I hope someone can give me some advice, thanks!