I just updated a fully functional version 3 RC to current 3.3 via the binary update. The keyboard does not work, nor either controller an ibufallo classic SNES controller, or the F310. The system sees the controllers, but not any input. I use the controllers separately one at a time as the player one controller.
Pi Model: Raspberry Pi 2
RetroPie Version Used: 3 beta from image sucessfully updated to 3 RC2 then update to 3.3
Built From: (SD Image, Binary, Source)
USB Devices connected: keyboard, IBuffalo, or F310