Back in late June/early July, I reviewed an app called Wi-Fi Sync for jailbroken iPhones. You can find my revised version of the review here. Originally this seemed like a pretty neat app. It's a bit pricey for what it does, but it did it well.
Now I've been having several issues with iTunes over the past 2 months. I couldn't restore or upgrade firmware (it would hang up at the very end and leave all my devices in never ending recovery loops). To my dismay, it also broke backups within iTunes. I found this out after I wiped one of my devices and then noticed my last backup had been 2 months earlier. In frustration, a buddy on Twitter (@snoslicer8) asked if I by chance had Wi-Fi Sync installed. And without a doubt, that was the problem.
Needless to say, click along to see how to fix these issues if you're having problems with iTunes and you've previously downloaded W-Fi Sync. Odds are, it's the culprit.