Another bug I noticed, When I start iTunes on my iMac, it does not always find my APPLE devices, even though I have "Sync with this iPhone over WI-FI" checked. Sometimes it finds the devices, sometimes it lists none. I updated my 5S and iPad rMini and have a 6 Plus. Had that issue when I first got my 5S, but later iOS updates fixed that. Apparently the bug is back in iOS 8. The only way to fix that, is connect device back to iMac via the lightning cable, uncheck wifi sync, close the itunes program, start it back up and check the box again.