Four oF NINE
macrumors 68000
What kind of issues?
I've had syncing issues with iTunes 11.1.2 and .3 with iOS 7.1 beta's where iTunes would freeze in the middle of syncing or take a very long time to finish syncing.
I haven't had an issue yet with 11.1.4 iTunes update and iOS 7.1 beta 4, but it was just released today so I'll give it some time before I call it fixed.
This sort of issue.. I've had problems where apps purchased via iTunes store won't load to an iOS device via sync with OS X 10.9.2 beta