I'mn afraid your blog post is almost completely unreadable in Chrome and Opera on Windows 7.
And here I was thinking it was just me...
EDIT: It's that 'LM Roman' font. Remove it and it will be fixed.
I really like Latin Modern/Computer Modern, just when it all goes to plan.
(I dig the TeX-lookalike WP theme, but it should really use other @font-face formats for compatibility, e.g., WOFF and EOT; that might make it look better in other browsers.)