Netinfo Logins/Passes GONE!


I was using my computer today, and Mail wouldn't run. So I logged out, tried it again, still no luck. It occurred to me that I hadn't rebooted in at least a week, so I figured it couldn't hurt. I figured wrong.
When my computer was booting, it asked me to login. I have it set to auto login. I tried to login, but no dice! It said my user or pass was wrong, when I was absolutely sure it wasn't. I tried to login as root too, no help there either. Does anybody have any ideas? Is there any way I can fix this through single user mode? HELP!!!:confused: