[Typo3] htmlArea RTE and Page TSConfig issue

[Eduardo Frank]

Hi everybody,

I'm using htmlArea RTE with Firefox on Mac OS X. I've added to the 
TSConfig of the root page of my site (based on 3.7.0) the following 
lines:

RTE.default.contentCSS = fileadmin/templates/main/res/cmedia.css
RTE.default.classesCharacter = leftImg, emphasized
RTE.default.hideButtons = emoticon

Using the Web/Info module in the backend I can confirm that the 
TSConfig for the RTE reports to have successfully overruled the default 
configuration of the RTE. But when using the RTE editor, the classes 
leftImg and emphasized are not available in the pulldown menus. On the 
other hand, the classes that were originally active after installation, 
continue to be active, even though I assigned a new css file as default 
css. Futhermore, the emoticon botton is visible, contrary to the rule 
specified. I'm somewhat persuaded that the rules I put in the TSConfig 
of the root page are not overruling anything for some reason still 
obscure to me.
Can anyone shed some light on this case? Has somebody had similar 
experience? Any help is appreciated.

Eduardo Frank