I have some editing done to the css and the category_item.php page and was happy with what things looked like until I tried to add introtext on my articles.
When I add introtext with a read more break in a K2 article, the category and user/author page breaks.
Here is a picture with the read more introtext off:
http://oi43.tinypic.com/2nleezs.jpg
Now here is a picture with it on, and what it does to the right column:
http://oi44.tinypic.com/5zkryh.jpg
A couple things I know about what's going on. If I set introtext on, and leave the HTML introtext code in the category_item.php file, it works fine.
The moment it breaks is when I use the READ MORE function when making an article to specify what text to use as introtext.
Again, if I'm using introtext as default few characters at the start of the article it works fine, but using it with the read more break messes up the page.
The only css override affecting the "catItemIntroText" and "catItemBody" is to remove the 4px padding, nothing else.