Nice job - is there anyway you can make the background a toggle-able option, perhaps on or transparent / solid colour only it takes away the contrast of the text (at least for me). I think the post text font is slightly too small (with cleartype on it seems to be less clear ironically) and some posts have a linebreak between the title and the text, others do not - you could enforce this by checking the first char of the post and if its not a crlb, add one in there?
I was going to make the changes myself to see how they went however I lack the tools to dissassemble the ocx at work