[TYPO3-english] Classes are not removed

[André Hänsel]

Hi list,

when I switch RTE to source mode, add a class (e.g. <ul class="blah">), 
switch back and save, the class is preserved and does also appear in the FE.

Is this the intended behaviour? Shouldn't it be removed because it isn't in 
allowedClasses?

Regards,
André