Comment 54 for bug 139226

I Get this temporary fix:

In order to get banshee to see the ipod,
1. close banshee
2. use terminal to killall -9 nautilus (with the ipod disconnected).
3. Then connect the ipod, give it a minute,
4. then you can reinstate nautilus.

Most likely nautilus will go ahead and mount it at that point, if not, you may need to manually mount the ipod. From here you can go ahead and start banshee, where it will then recognize the ipod like normal.

good luck.