I'm also having this problem. Oddly it seemed to transcode my AAC files... to AAC format. The files were previously ripped with iTunes. They play without issue but if I use Rhythmbox to put music on the iPod (a 4th gen greyscale 20gb, firmware 3.1.1) and then try accessing the files on the iPod they're unplayable (a 3 minute song would keep the same filesize but report as 15 minutes in VLC, banshee or even on the actual ipod; nothing could make it play properly).
I'm also having this problem. Oddly it seemed to transcode my AAC files... to AAC format. The files were previously ripped with iTunes. They play without issue but if I use Rhythmbox to put music on the iPod (a 4th gen greyscale 20gb, firmware 3.1.1) and then try accessing the files on the iPod they're unplayable (a 3 minute song would keep the same filesize but report as 15 minutes in VLC, banshee or even on the actual ipod; nothing could make it play properly).
I think this issue is related to bug 95326:
https:/ /bugs.launchpad .net/ubuntu/ +source/ gstreamer0. 10/+bug/ 95326
I don't have much programming chops but I think sound juicer is using the same gstreamer component for ripping as rhythmbox uses for this transcoding.