I recently upgraded from unity 4.3 to 4.5 and am now experiencing problems building to windows phone. The game builds and runs fine, but since the upgrade it now hangs at random times. Some times it's seconds after starting the game and other times it could take half an hour. Visual studio gives me no error once this happens, but while playing I get these errors every now and then; The thread 0xccc has exited with code 259 (0x103). The thread 0xfa8 has exited with code 259 (0x103). The thread 0x16e8 has exited with code 259 (0x103). Actually, I still get them after the hang. The game stops responding on the phone, but if I leave it the above errors still keep coming up. I stupidly didn't back up the project before the upgrade (actually I did, but before noticing the problems I backed up again over the old version) and now it wont build on unity 4.3. Any advise on this would be great, I'm at a loss at how to solve the issue, although considering it seemed to work fine on 4.3, it could be a new 4.5 bug?