Login After Hibernate - Incorrect Password

I'm having an issue with logging back in after I hibernate the system. It goes to the login page where I enter in my password. The problem is everytime I type in my password, it tells me that I've typed the wrong password. I try to "switch user" and login from there (not sure what the difference is), and that doesn't work either. I always end up having to restart the computer. Then when it gets to the login page, I type in the exact password that I tried to type before, and it works. It's only right after I hibernate that the password stops working.