I got a new Atrix 2 and wanted to send some photos over BT (to the stupid "tmp" folder - why doesn't HP fix this?) and they arrived with crazy character names like "-$%#!A>A" and Chinese characters too.
I booted into CM7 and they transferred over fine. Wow even CM7 tells you you're getting a file and shows you where to open it from!!
It works on my old C905a and my 9650 so something with the Atrix 2's bluetooth is incompatible with the WebOS.