Mine is being replaced due to the bluetooth problem; I seem to have confirmed that (at least some) suppliers are aware that this is a known hardware problem.
If there isn't already a thread on this...
If you are aware of an issue that has appeared in at least a few units of the Note 10.1-2014, could you please post in this thread (a) the issue and (b) how users can quickly tell if they have it?
Bluetooth connectivity issue - some tablets as shipped cannot maintain a connection to a bluetooth keyboard and/or mouse. In my case either a mouse or kb works fine, but the two together immediately cause significant connection drop-outs. Some people seem to have the problem even with just a keyboard though. The input device will disconnect for 1-2 seconds at random intervals and any keystrokes will be lost. Sometimes (in my case anyway) the reconnection will be imperfect, in that the tablet thinks a key is being held down when it isn't, so it produces a long string of a particular letter.