I think it must be some incompatibility (model/animation). can you post files structure in your archive, and name of it? if it's not to large, maybe full your patch too.
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try to change models in ".dbc", not by replacing ".m2" files (now you can pack your patch older then 13329, for sample as 13350). when I tried to set TaM as NEF, with replacing ".m2" I had similar problem but only with "draw weapon". when I do it by ".dbc" modifying, it was more stable and had no crashes.