Hello, I am new to this forum, but I wanted to tell you that I have the same problem. I own a Samsung Galaxy Tab 2 10.1 WiFi and a Kensington KeyFolio Expert Bluetooth keyboard for Android. Just before updating I used my keyboard and all worked fine. I then updated from Android 4.1.2 to Android 4.2.2 and suddenly my keyboard is useless. I believe my Tab 2 sees the keyboard, because it appears in the Bluetooth section, but I get a warning, that my Tab 2 fails to communicate with the Kensington keyboard. I sent an e-mail to Samsung Netherlands and they replied that maybe my keyboard was not compatible with Android 4.2.2 (and/or higher). Is this true or is this a lot of BS? I really NEED the keyboard, because I use my Tab 2 for business purposes; without the keyboard the tablet is almost useless to me. Does anyone have a solution to this problem? It drives me crazy!
I am Dutch, so maybe my English is not perfect. If so, I apologize.