Post bodies are missing

First of all, I know the version of WordPress I’m using has security issues. However, Yahoo! is my current host and they refuse to upgrade to one of the newer versions. I intend to move to a new host very soon (I’m sure I’ll need help because I don’t want to lose my entries. Anyway, that’s a whole other problem.)

My current problem:

I was updating and adding some plugins: All in one SEO, Google sitemap, Counterize, etc. Now, when I view my blog index it displays the title of the last post but it does not show the post body or any other titles and posts.

I deactivated all my plugins and tried all my themes – all to no avail.

I can’t just uninstall and reinstall because my version of wordpress is a yahoo add-on so the backup feature doesn’t work.