Occasional freeze and reboot on (original) iPad at Game Start

Unity Engine
,
1

for a few days now, I am experiencing my (original) iPad to freeze during game start or very short after
Both when launched on iPad or from Xcode.
After a while the iPad reboots. Which is really bad :confused:
(There were no problems in Xcode3.x Times)

OSX 10.7.2
Unity 3.4.2f2 iPhone Basic (using no 3rd party PlugIns)
Xcode 4.2

My game doesn’t use anything particularly fancy. The Real Memory Usage is about 88MB and the Allocations Instrument gives me some warning flags (memory warnings) during the starting phase of the game.

I tested every possibilty that i could think of, but it all did’t change anything. The only pattern that i obsevred is that the freeze/reboot happens mostly, when the iPad wasn’t in use for a few minutes.

the last lines in Xcode:
→ force accelerometer registration
→ applicationDidBecomeActive()
2011-11-06 08:53:51.937 mysecond[237:707] Received memory warning.
WARNING → applicationDidReceiveMemoryWarning()
Program ended with exit code: 0

I’ve tested a version of the game with exactly the same scripts, but small textures (=> no memory warning). I launched it over 50 times, so far without experiencing any Freeze/Reppot.

Is it really likely that it’s the Memory Issue that causes the freeze?
Is a Memory Issue really able to freeze the entire device and force it to reboot???
What else is actually capable to cause a reboot (if it’s not the Memory Issue)?

2

Oh Nooo :confused: I thought i fixed it.
My App started again to freeze the iPad which then reboots shortly after. I decided that it was not the App size (ca. 90MB which i think is totally fine) causing it.
I forced the scripts to execute in a specific order (in Unity/Edit/Project Settings/Script Execution Order). Because I thought maybe there is happening a conflict causing an infinite loop or something which causes the iPad to reboot. The App always runs fine in Unity and on the iPod. And the build on the (original) iPad also ran stable for a week (with over 100 test launches).
It is very eye-catching that the crash always happens, when it was launched the first time, after it wasn’t launched for a while.
It wasn’t there before iOS 5. (the app is targeted iOS4.3)
Does anybody have a clue what this could be?
What is actually able to crash the iPad so badly that it has to reboot?
Any thoughts are very appreciated.