I put in a picture password, and it did not ask me to input secondary password in case the picture password fails. Now my phone is locked and there is absolutely no way for me to get into it because I don't remember where I put the number!
The discussion over at CrackBerry got a bit out of hand, but the bottom line is they'll have to do a factory reset due to the fact there is no Device PIN to fall back on. In BB10, when setting up Picture Password, it forces you to setup a Device PIN as well. I seems the PRIV does not force this, so if you only setup a Picture Password and forget it, you are out of luck.
Maybe an oversight by BlackBerry on this setup, or maybe intentional... but a lesson to be learned for sure.
The user guide linked here recommends this as well:
http://help.blackberry.com/en/priv/5.1/user-guide-pdf/PRIV-5.1-User-Guide-en.pdf
"Picture: A picture password requires you to move a number (that you choose) to a specific location (that you choose) on a picture (that you also choose). A picture password provides a convenient way to unlock your device and is difficult for someone else to figure out. If you set up a picture password, you must also set a backup screen lock in case you forget your picture password combination."
Good to know.