Yeah! 4.4! Rocks!
Sorry, just discovered this one a bit too late for rc2:
If you assign a class to a section, and want to remove it afterwards, the old class it will stick unless you replace it with another class.
Must be sth. with the POST -> if attributes are empty they won't get changed/cleared.
A temporary solution is to just give the section some classname such als "blah" or "noclasses" ;-)
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