I am having an issue where exporting an FBX causes the weight to change on certain bones. It seems that it is setting the weight to 1.00 on most of the verts assigned to those bones. This issue doesn't happen with collada files but my shapekeys aren't exporting with those so I need to use an fbx. This is what the weight for the shoulder looks like in Blender:
And it's not a Maya problem -- it looks like that elsewhere too. Any help would be much appreciated!