The Safari tab issue has been noted in another thread. Where else is it still very buggy?
Sometimes when you press on a app and expect it to open, it thinks you are holding down as if to delete the app.
So sometimes, I tap on a app to open it but it delays for a second or three and then starts to wiggle so you have to press the home button to lock it down again and then tap is again to open.
Multitasking and double pressing the home button also causes some buggy moments too.