Good advice from larry...as always. I've also noted some glitches where normally, there shouldn't be any. A few users have had issues with "Polar Express" when attempting "complete disc", whereas "main movie" ripped and burned just fine. Take a look at the thread, "Polar Express" on this forum. I haven't Bkup'd madagascar but "sw" and "wwow" are fairly large files and compression will probably approach 50-55% on complete disc, and depending on the degree of compression on the original disc itself, this is significant re: playback quality.

I don't know what blank media you're using, but a change here could benefit you as well.

Hope this helps.