Re: size of Code-block on Tikipedia
What browser are you using? My goal was for the code div to be width of the center column, and have a scrollbar if its contents are wider than that. Unfortunately, this doesn't work as expected in Firefox. That's why I gave the div a specific width instead. I don't have time at the moment to look into this now but suggest you check the page with other themes and see if any are handling this better, and if so, try using their rule for the code block width. Also, try using the 'wrap=1' parameter in the code plugin to see if it helps.
-- Gary