The new FCKEditor version that comes with DNN 4.9 handles font sizes differently. If you look at the source code it will say font size="xsmall" where as before it would say font size="2". This displays fine in IE but displays very small in Firefox. Any way of adjusting this or going back to previous FCKeditor until this is resolved?

Take a look at the following comments to see that minimal differences will always be there when using different browsers

http://forums.techguy.org/web-design-development/690298-font-size-different-ie-firefox.html

So this is not a problem with FCKeditor

You can try by entering some sample sites and you will see some parts looking different when using different browsers. Some times it looks a little bigger in IE and sometimes it looks bigger in FF. This also depends on the font-face attribute (different fonts).

I guess what i'm saying is that I had pages created previous to installing DNN 4.9 and the code reads font size="2" now if I create new text the code reads font size="x-small". Previously using an actual number such as 2 the fonts displayed exactly the same either in Firefox or IE. Now using sizes such as x-small things appear smaller in Firefox.