Comment 3 for bug 1072072

I have had the same issue since I swicthed to 13.04 (clean install). The error happens when the synchronization encounters the first file to convert (flac to mp3). All the files that didn't require transcoding and which transfer was started before, were successfully copied to the device.

Leaving banshee hanging for a few minutes (more than 10), the CPU load remains at 100% and the transfer does not complete.