Howdy,
I grabbed the Unity 4 beta to start digging into the new features and attempting to run my app crashes the beta IDE.
I then built a Windows standalone to test things out and it ran fine, until I closed the app and it crashed. Here's the stacktrace in the crash logs:
(0x54AA71BA) (libgfxunity3d): (filename not available): SF_GotoAndStop + 0x242a
(0x54AA15B7) (libgfxunity3d): (filename not available): SF_Advance + 0x97
(0x084D2371) (Mono JIT code): (filename not available): (wrapper managed-to-native) Scaleform.GFx.Movie:SF_Advance (long,single,bool) + 0x41 (084D2330 084D238C) + 0x0
(0x084D231A) (Mono JIT code): (filename not available): Scaleform.GFx.Movie:Advance (single) + 0x6a (084D22B0 084D2323) + 0x0
(0x084D2099) (Mono JIT code): (filename not available): Scaleform.SFManager:Advance (single) + 0x159 (084D1F40 084D211E) + 0x0
(0x084D1436) (Mono JIT code): (filename not available): SFCamera:Update () + 0x56 (084D13E0 084D1461) + 0x0
(0x084D130C) (Mono JIT code): (filename not available): OdysseyCamera:Update () + 0x70c (084D0C00 084D132C) + 0x0
(0x084AE629) (Mono JIT code): (filename not available): (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr) + 0x41 (084AE5E8 084AE67D) + 0x0
(0x100F03CE) (mono): (filename not available): mono_set_defaults + 0x22c0
(0x1005EDBF) (mono): (filename not available): mono_runtime_invoke + 0x51
(0x0117CD13) c:\buildagent\work\5627eec0561ce49f\runtime\mono\monobehaviour.cpp (536 + 0x18): MonoBehaviour::CallMethodIfAvailable + 0x73
(0x0117CDDA) c:\buildagent\work\5627eec0561ce49f\runtime\mono\monobehaviour.cpp (628 + 0xb): MonoBehaviour::CallUpdateMethod + 0x6a
(0x0117CDE7) c:\buildagent\work\5627eec0561ce49f\runtime\mono\monobehaviour.cpp (634 + 0x0): MonoBehaviour::Update + 0x7
(0x0114D3B8) c:\buildagent\work\5627eec0561ce49f\runtime\misc\player.cpp (1601 + 0x0): PlayerLoop + 0x458
(0x012017EF) c:\buildagent\work\5627eec0561ce49f\platformdependent\winplayer\winmain.cpp (396 + 0xc0): MainMessageLoop + 0x15f
(0x01202B3C) c:\buildagent\work\5627eec0561ce49f\platformdependent\winplayer\winmain.cpp (777 + 0x0): WinMain + 0x7cc
(0x01598740) f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c (275 + 0x1c): __tmainCRTStartup + 0x11a
(0x75A2339A) (kernel32): (filename not available): BaseThreadInitThunk + 0x12
(0x77E89EF2) (ntdll): (filename not available): RtlInitializeExceptionChain + 0x63
(0x77E89EC5) (ntdll): (filename not available): RtlInitializeExceptionChain + 0x36