Samsung just updated their own Galaxy Note 10.1 to Android 4.1.2. The update is only available in Germany at the moment. Android 4.1.2 makes the tablet again a bit faster.
You can update your Galaxy Note ny Samsung KIES, OTA services of Samsung or just the ODIN way
Samsung announced begin last year at MWC 2012 the Galaxy Note 10.1. The Galaxy Note 10.1 uses a 10.1″ screen, quad-core processor, 5 megapixel camera and has all SPEN functions on board.
Information about the firmware:
Android = 4.1.2
GT-N8000ZWADBT = Germany
CSC = N8000OXACMA1
Modem = N8000XXCLL1