I giggled a little bit when I saw the 6px numbering down the right side. Most people have trouble with anything below 11px or 12px, so to cut that in half is pretty funny. If you don't want the numbering, just remove it, otherwise it needs to be bigger.
Also, the post titles shouldn't be 20px. That's about what you would use on an <h1> tag and you typically only have one or two of them on an entire page (whereas you have 30 of them).
Scale everything down.