SWF built with 4.5.1f3 logs error on engine start up

Hi,

We've recently updated our Unity installation from 4.3.4f1 to 4.5.1f3 and when building the same project the flash logs show the following on starting up the built SWF:

Initialize engine version: 4.5.1f3 (73cd57f80e3e)
MolehillGfxDeviceirectX9
PlayerConnection initialized from (debug = 0)
PlayerConnection disabled - listening mode not supported
Unable to find type [UnityEngine.dll]UnityEngine.TextGenerator
Error
at com.unity::UnityNative$/Ext_Flash_LogCallstack()
at com.unity::UnityNative$/_Z17DebugStringToFilePKciS0_iiii()
at com.unity::UnityNative$/_Z26FillCommonScriptingClassesR22CommonScriptingClasses()
at com.unity::UnityNative$/_ZN11MonoManager7PRODUCEE10MemLabelId18ObjectCreationMode()
at com.unity::UnityNative$/_ZN6Object7ProduceEii10MemLabelId18ObjectCreationMode()
at com.unity::UnityNative$/_ZN14SerializedFile10ReadObjectEii18ObjectCreationModebPP8TypeTreePbPP6Object()
at com.unity::UnityNative$/_Z31ReadObjectFromPersistentManageri()
at com.unity::UnityNative$/NativeExt_Initialize()
at com.unity::UnityContentInternal/initNativeEngine()
at com.unity::UnityContent/checkAndStartEngine()
at com.unity::UnityContent/onFrameInitStep()
Unable to find type [UnityEngine.dll]UnityEngine.TextGenerator
(Filename: Line: 34)

Unable to find type [mscorlib.dll]System.Object
Error
at com.unity::UnityNative$/Ext_Flash_LogCallstack()
at com.unity::UnityNative$/_Z17DebugStringToFilePKciS0_iiii()
at com.unity::UnityNative$/_Z26FillCommonScriptingClassesR22CommonScriptingClasses()
at com.unity::UnityNative$/_ZN11MonoManager7PRODUCEE10MemLabelId18ObjectCreationMode()
at com.unity::UnityNative$/_ZN6Object7ProduceEii10MemLabelId18ObjectCreationMode()
at com.unity::UnityNative$/_ZN14SerializedFile10ReadObjectEii18ObjectCreationModebPP8TypeTreePbPP6Object()
at com.unity::UnityNative$/_Z31ReadObjectFromPersistentManageri()
at com.unity::UnityNative$/NativeExt_Initialize()
at com.unity::UnityContentInternal/initNativeEngine()
at com.unity::UnityContent/checkAndStartEngine()
at com.unity::UnityContent/onFrameInitStep()
Unable to find type [mscorlib.dll]System.Object
(Filename: Line: 34)

Initialize engine version: 4.5.1f3 (73cd57f80e3e)
MolehillGfxDeviceirectX9
--> from here on it generates logs from our own code


This is not the case for the swf built with 4.3.4f1.

We have yet to encounter any issues with the new build though, it runs fine regardless of the errors in the log.

Of course, we would still like to know what these errors imply and if it is safe for us to continue using 4.5.1f3 and simply ignore them.