Crash on iOS after upgrading to Unity 4

Hi All,

I upgraded my project to Unity 4 recently.

with Unity 3.5 the application itself was running fine on both Android & iOS.

However, after upgrading I discovered a crash (iOS only on Android everything still in order) related to the way I am loading Assets from the Assetbundle (it didnt happen with the old build)

if I use LoadAsync to load an asset from assetbundle I get the EXC_BAD_ACCESS in a thread with stack calls ending with:

SubstanceSystem::WaitFinished(LoadProgress*)

PreloadLevelOperation::Perform()

if I use Load I dont get the issue

code:

 //crashes
 AssetBundleRequest assetBR = WWW.assetBundle.LoadAsync("avatarskeleton", typeof(GameObject));
 if (!assetBR.isDone) return false;
 
 //works
 GameObject avatarSkeleton = WWW.assetBundle.Load("avatarskeleton", typeof(GameObject));

I am wondering if anyone else has noticed similar issues after upgrading to Unity 4

Thanks

==EDIT==

Thanks to nomago for pointing out the stripping level. I reported a bug to Unity hope it will be fixed