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