Ubuntu Multimedia :: Banshee Seems To Be Making Files Shorter

Trying to sync a bunch of files to a 5.5-gen iPod with Banshee 1.6, on Lucid. I moved the files from my friend's computer to my Sansa View via UMS transfer; just dragged and dropped. The file lengths are correct on my player. My friend used Banshee to sync the same files, from the same computer, to his iPod. In Banshee and on his iPod, the files are all shorter. The files are supposed to be approximately 30 minutes each. In Totem on my friend's computer, and on my Sansa, the first file is 33:11. In Banshee and on his iPod, it's about 17:00. Some files have been cut down to two minutes long. This has happened across multiple albums in multiple folders. Clearly the problem is Banshee, since Totem recognizes the appropriate file length.