It won't sync iPod or iPhone 4s via USB nor the iPhone over Wifi.
Won't even sync local files with iPod.
Oddly the iPod pops up for a split second and then disappears. The iPhone does not appear at all.
I have read around the forum and fiddled around with firewalls, updates, offline mode etc... but nothing seems to work - the fat that Spotify boots out the iPod after initially detecting it makes me think that this is a little more deep rooted.