that...

...just noticed that it is displayed different when leaving the float:left:

So what about that?

.postinganswer           { font-size:0.82em; }
html>body .postinganswer { float:left; } /* all but not IE */
*+html .postinganswer    { float:left; } /* IE 7 only */

Could anybody test it with an IE 6 (I do not have one at hand right now).

Alex