[PLUG] Help! Can't log in!

[John Jason Jordan]

An hour ago I applied a number of updates to my Xubunu 13.10 laptop, but
deferred rebooting until I finished typing something in Greek. Having
done so I shut down LO Writer and rebooted. When the login screen came
back up it would not take my password, presumably because the keyboard
was still in Greek. 

I was able to log in as a guest, and the guest's keyboard was in
English (verified by typing something while logged in as guest), but
when I reboot JJJ still can't log in. I checked for the obvious (caps
lock is not on, etc.). On the Xfce login screen there is an icon in the
right side of the top panel that allows me to select the language, but
even after selecting US English, I still can't log in.

Interestingly, if I leave the password blank I get an error message
that the password is wrong. I do not get this error message if I type
in my correct password. Therefore, I assume that I am typing in my
password correctly, but one of the updates broke something and Linux
now just recycles to the login screen instead of proceeding to the
desktop. 

I really need some suggestions, urgently!