12.10 - Black screen after boot (after installing nvidia drivers)

I installed Ubuntu 12.10 on my old laptop.
I downloaded new nVidia drivers that released yesterday (my Vcard is 7000M) and installed it as described here .
After rebooting, I see for 1 second login promt and then black screen with cursor, but I can't type anything.

I removed nvidia drivers in safemode, but problem doesn't solved.
What to do?

Try this, it worked for me (problem with lightdm)

ctrl+alt+f1. Login and do a restart lightdm

then i could log in to desktop and do : gedit /etc/rc.local
before the "exit 0" line insert this line: service restart lightdm

It worked for me, and i hope it'll work for you