Unable To Log In After PR1.3 Update

I have updated my Nokia N9 to PR1.3 but I was unable to log in (to enter the security code) after it.

The workaround was to remove the SIM card and reboot.

I had problems using the security PIN even before PR1.3, so after logging in successfully, the first thing I did was to disable the security lock altogether (from Settings/Security). I feel less safe now... but at least I can use the phone again.