itunes upgrade to 10..4.0.80 issues

Before the upgrade, and at previous version, no issues.

Had both an iPad2 and iPod Shuttle pluged into USB 3 ports, which worked fine.


Now, neither of them work in USB 3.0 ports, and my iPod was totally
erased of all music. When I replug to USB 2.0 ports they work.

My music library shows (!) next to a few songs, like it deleted them.


So what gives with this upgrade?

Can somneone point me into the right direction in fixing this?