Mark, I think the Register button goes away when you choose that the site is not public from the Admin pages. I'd prove that before posting, but I can't get in!

Still looking....

Mark, I think Register goes away when you turn off the setting that makes it a public site. That has been gone, I'm almost positive, since we made it a private site.

Yes, we are still having the problem, and here's a new clue:

The main site is Portals\0, and I have another site on Portals\1 (www.ttuckertech.com). Both have the login issue, but when I tried to logon to ttuckertech.com this morning, I get an error that (kicking my own butt) I did not write down at the time because I thought I could recreate it.

The error contained wording that a critical error occurred, that the maxrequestquerylength (or something like that) exceeded maximum length.

The error was displayed on the main page, above the Top Pane.

I hope this is a good clue.

  Good point about the logs. I had not thought of that.

As far as actions, we do not need to change anything right now. If we cannot figure this out, our only option is to wipe and reinstall.  We are past our web hosts seven day window of backups.

I can get in with Query Analyzer, and can look around, but I would not know what to look for.

Thanks. Any other advice welcome.