I was just viewing your source for the page and noticed this:
<font size="1"><span style="font-size: 78%; font-family: trebuchet ms">
You have a
<font size="1"> added before it, and by default, you shouldn't have to specify with a span style either I'd imagine, the font's sizes I would think should be ok just by the font's specifications from the CSS file.
Further down through the codes, I found this:
<span style="font-size: 78%; font-family: trebuchet ms" />
<span style="font-size: 78%; font-family: trebuchet ms">
It's spitting out the first line, before the second one, which shouldn't be there.. And this is happening more then once down through the page.
This happens to me sometimes. Codes are some how added within the Post's Codings from when writing a post within the CP. I then have to go and click on the HTML button for the post and remove un-needed codes.
Just specify all the fonts and such via the CSS file, and then write a post in the CP like normal, with no added extra codings. It should post as it should, going off the specifications for them in the CSS. I hope I'm not confusing you.. :/ And I sure hope I'm posting a legit suggestion and what not.
Also, go here and read the errors and fix accordingly as well..
And also, if you're using some program like DreamWeaver, MS Word to make posts before adding them to WP and publishing them, DON'T. Use NotePad2 http://www.flos-freeware.ch/notepad2.html