'this' pointer is misaligned crash loading packaged game

Just to bump this, as I’ve been having this come up as well but in my Character class blueprint.

[2014.08.07-14.28.56:379][  0]LogUObjectBase:Error: 'this' pointer is misaligned.
C:\Users\turnerr\Perforce\turnerr_cals_dev\Unreal4\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp(233): Fatal error:
Invalid object in GC: 0x00ffffff00ffffff, ReferencingObject: BPA_FPSCharacter_C /Game/_Common/Blueprints/BPA_FPSCharacter.Default__BPA_FPSCharacter_C, TokenIndex: 34

My call stack is as follows (the image posted previously seems to be broken):


Is there anyone else who has been getting this or errors like it? Any clues as to what it means or what causes it?