Has anyone had any bluetooth problems with this model? My problems started with off-brand mice which I fixed(?) by just getting a wired mouse. Now my apple bluetooth keyboard is dropping in and out along with my bluetooth headphones. Interference from my wireless router had been cited as a possible cause, but I am running a time capsule which shouldn't really interfere. I am not too knowledgable with Bluetooth and 5ghz/2.4ghz connections, so any help is appreciated.