I pointed out very factual information:
1- Upgrading from 9.2.1.2 will fail for some users, the original 9.2.1.2 README didn't contain the required information, instead you must retrieve the *updated* 9.2.1.2 README
2- There are two 9.2.1.2 different version out there.
3- The command line provided in the README will not work if you access the freenas box over ssh, you need to amend sudo to the command (and that assumes the user is in the sudoer list)
4- The download page doesn't work with some version of Firefox, and instead it takes you back to web.freenas.org. (seems related to javascript incompatibility)
For people not wanting to go back and manage to find where the 9.2.1.2 README is, the command to run to be able to upgrade from some version of 9.2.1.2 to 9.2.1.3 is:
Log into your freenas box, and type the following commands
it is best that you access the freenas over the native console, so you are automatically logged as root.