I haven't had a problem with most other themes but the Motion theme is blurring any source code, that I post and highlight with the sourcecode tag, in Firefox. It's almost unreadable. Internet Explorer 7 appears to ignore whatever is going on and the source code segments are displayed fine.
Here's a good example post with the problem http://misterdai.wordpress.com/2010/02/26/upload-size-before-cffile-upload/
The blog I need help with is misterdai.wordpress.com.