This now happens regularly at random times with Unity 3 - beta 6, that I get the following running my game on an iPhone 4 with iOS 4.0.2 (8A400):
Watchdog has expired. Remote device was disconnected? Debugging session terminated.
Watchdog has expired. Remote device was disconnected? Debugging session terminated.
The Debugger has exited due to signal 15 (SIGTERM).The Debugger has exited due to signal 15 (SIGTERM).
and then the iPhone reboots. Is this a Unity 3 bug?