I've noticed the same issue that whats_up_skip & pigro reported previously. On several recent hour-long walks while trying to use tracking & listen to music with a bluetooth headset my tablet has almost completely locked up, once draining the battery from about 3/4 full so I had to swap to my backup. On either occasion the tablet was so unresponsive that I'm sure if a call had come in I would'nt have been able to answer it. It took quite a long time of fighting to close either running application down so I could at least get it to respond at all.

Great piece of software otherwise . Keep up the good work. TX