First, awesome theme. So many possibilities.... (and so many places for me to get lost).

Question: Where do I change the width of the body copy in a post? My problem can be seen at http://www.bookbuilders.org/wordpress/?page_id=83 and http://www.bookbuilders.org/wordpress/?p=94 where the content of the post body overflows the container.

I think the problem comes either from the setting of td #middle or post_bodycopy p but I don't seem to be changing their values in the correct places.

Welcome spencer,
Ummm I'm using Safari on a mac and I don't see any overflow at all, no matter how small I make the page.

the width of the center column (where the posts go) is variable. It depends on
1) Atahualpa Theme Optons->Sidebars->LEFT sidebar WIDTH
2) ATO->Sidebars->RIGHT sidebar WIDTH
3) ATO-Layout->Layout MIN width
4) ATO-Layout->Layout MAX width
and weither or not you have rezsized the wisplay you are viewing the site on.

You shouldn't need (at least not to start) to edit style.css at all. If you need to do adjustments, put them in ATO->HTML/CSS Inserts->CSS Inserts

Thanks for the help.

The clue lay in your comment that it looked fine in Safari on a Mac. It turns out that it looks fine in most everything on a PC *except* Firefox. I'm used to IE throwing a monkey wrench in the works, but I'm not used to Firefox being the bad sport. Once you tipped me off to that, I found the part in styles.css about Firefox not handling overflow properly, and was able to fix the problem.