more styles combo box woes

Hi

I've sorted out most of my styles combo box problems : I've figured out how to to configure the combo box so it applies my classes AND I've figured out how to import a stylesheet so that the text in the editor texterea is correctly styled

BUT...

I can't figure out how to style the names in the combo box without it inserting the styles into the html code

so with this :

CKEDITOR.addStylesSet( 'default',
[

   { name : 'Center text',
   element : 'p',
   attributes : { 'class' : 'center' },
    styles : {    
      'font-family' : 'Arial, Helvetica, sans-serif',
      'font-size' : '12px',
      'text-align' : 'center'
   }},

the name "Center text" is indeed centered in the combo box drop-down but when I apply it to a <p> it inserts the class AND the style, like this :

<p class="center" style="font-family: arial,helvetica,sans-serif; font-size: 12px; text-align: center;">

to stop it inserting the style="" I have to remove the styles from the class definition in the addStylesSet() but then the name "Center text" in the combo box drop-down is not centered and shows up in Times font

so... is there a way of styling the names in the combo box WITHOUT it inserting those styles into the html (just the class name) ??