Disaster after Upgrade

I have a membership site with over 1000 posts, each post being a member, with a dozen custom fields.

Constructed over a year ago and working fine all this time.

Upgraded from 2.5 to 2.71 yesterday. Plus, updgraded all plugins.

NOw the Posts are not only not showing up on the blog page, they are not showing up on the admin Posts page. Says I have 1013 Posts, but nothing. phpAdmin shows all of the posts, users and meta data.

This is maddening. I’ve reinstalled wp twice. I’ve turned off plugins, makes no difference.