said by haroldo:I hit this problem with Windows 7 & iTunes all the time. If I do a cold reboot of PC; then start iTunes; then Wifi sync works just fine. But if I shutdown iTunes and restart iTunes later on; the wifi sync won't work until I do the full reboot of PC & restart of iTunes fresh after the reboot. I think it has something to do with re-establishing ports thru the Netgear router when a reboot of PC is done.
Since upgrading to iTunes 11, I don't believe iTunes has ever seen either iPhone or iPad (both fully up to date) over WiFi.
I rebooted Airport Extreme, turned off and on WiFi, etc. to no avail.