I upgraded WP and Atahualpa and, post-upgrade, only the excerpt is showing when viewing the actual page. The home page, too, shows only the excerpt even when it is set to show the full post. It's clear that what is showing is the excerpt, since I can change its length by changing the excerpt length setting, and I can control what shows (images, links, etc.) by changing the "don't strip tags" setting.

Enabling a different theme fixes the problem - the posts display normally. The posts look normal when edited. Weirdly, even doing "preview" of the normal-looking post displays the excerpt. Thoughts?

what version of Atahualpa and WP?
What is the URL?
What versions did you upgrade from?

The current versions are 3.3.2 on Wordpress, 3.7.6 on Atahualpa. WP upgraded from 3.3.1, not sure about the theme but this was the first time I had noticed the update flag showing. Site is boxwines dot org.

Probably unrelated, but I notice that if I try to shift CSS and JS to external, it doesn't work: the site loses its formatting. If I change back to inline, it's OK.

Thanks, juggledad.

go to ato->export/import settings, export your settings and attach them to a reply (paper clip icon)

More unexpected behavior: clicking the import/export button results in no file creation and the site home page loads.

I'm thinking I should just delete the theme and reinstall it. My guess is the upgrade process corrupted something in the theme files. Other themes don't seem to have any problems.

That sounds like a good idea.