Hello Bryan,
I succeed to replicate the issue, the last few days were fine but today it did it again - I was logged in to my admin console and then i did a preview of my website and it happened - The loading was very slow and the computer didn't respond while it was loading the page...Also after the loading the fonts are not displayed - If i press F5 then i can see them displayed on my blog...I've uploaded a screenshot from the dev tools as you mentioned here:
http://faitdiversfrance.files.wordpress.com/2012/10/sc_1_type.jpg
Thanks a lot for your help