At the risk of sounding like a newbie, I think the changes are nice. At the very least, it's not bright pink (/. OMG ponies!).
My only request is increasing the right column's max width. With IE or Firefox the space for text is only half my window's width, with a large empty void on the right side. (My monitor's resolution is 1280x1024)
...I know nothing about web development and design, and I tend to get buried in other work and disappear for months at a time, or I'd volunteer to help. But, I dug through a page's HTML, found the link to abitmodern.css, and checked the settings for "#col-right". It appears to be limited to a max of 600px, which corresponds to what I'm seeing. I get the impression it was set to that for a reason, from reading other posts...
On a separate note, with IE 6 I see an extra indent to the left of the menu. Some types of content like wide pictures and code snippets make the content begin below the menu, causing the left edge of the black text to overlap the brown background color of the indent, making it partially unreadable. If the max width can be increased it would probably make the problem go away in most cases, for people using a monitor resolution above 800x600.
The alternative is removing code snippets (or shortening their lines) and shrinking pictures to make things fit nicely.
I hope I'm not beating a dead horse; it looks like nobody's replied to this thread for a while.