[Typo3] RTEHtmlArea / fdfx_2cols don't assume CSS classes

[Meik Schmidt]

Ok,

i can narrow down the problem. Only if i mark some text with a class
from the text drop down menu the changes aren`t be available at the FE.
All the other formatting buttons inclusive the paragraph drop down menu
with my own CSS classes work fine!

BACKEND   --->   FRONTEND

- paragraph drop down menu

<p class="topic">...text...</p>  keeps  <p class="topic">...text...</p>

- text drop down menu

<p><span class="redText">...text...</span></p>  are changed in
<p>...text...</p>

It seems that the RTE does not accept the span-tag? But i don`t
understand why the RTE does not accept the span-tag only for the left
column. In the right column i can use the span-tag!