App paused on Splashscreen. Getting EXC_BAD_ACCESS error

Hi all

Firstly, I am very knew to development so I am working my way through xcode and apologies for my lack of knowledge. I am close to releasing an app and keep getting this error in xcode. I build and run from xcode and it pauses on the splash screen. All I can see in terms of errors are:

 Thread1: EXC_BAD_ACCESS(code=1, address=0xc).

Also in the debugger I have this as the last entry before it pauses:

 Loading /var/mobile/Applications/D7E40D40-7721-4423-993F-08BC86EC64E9/itraintaekwondo.app/Data/Managed/uSequencerRuntime.dll into Unity Child Domain
 - Completed reload, in  0.191 seconds
 -> applicationDidBecomeActive()
 2013-03-28 15:20:06:074 itraintaekwondo[505:2311] TestFlight: Team Token is recognized
 The referenced script on this Behaviour is missing!
  
 (Filename: /Applications/buildAgent/work/812c4f5049264fad/Runtime/Mono/MonoBehaviour.cpp Line: 1591)

What's really strange is if I stop the build running in xcode and load directly on the ipad it works fine. Also when downloading and installing from testflight there is no problem, app fires up and gets past the splashscreen.

I have cleaned the build, created a fresh build from unity but still get this problem.

Any help appreciated as I am totally stumped.

thanks

Matt