"Or something to that effect. Unfortunately, I don't have the screen to cut-and-paste from (not complaining). We ended up getting this error for regular users and administrative users, including root. It seemed like there wasn't an account available that could log in to the box. Eventually the problem was solved, but it was an interesting situation and, perhaps, some of the following troubleshooting information might be of help to you in the future (So you don't have to boot "rescue" off of CD more than once ;)
"Here's how it went down (try to contain your excitement. This is edge-of-your-seat stuff, so, please, go to the bathroom before you continue reading ;)
"1. The first thing we did was to try logging in with all the accounts we could think of. None of them worked, although we were relatively sure that they were enabled and had worked previously."
