^ My interpretation was something developed not by the manufacture of the product, but
I guess that is wrong as illustrated here
out-of-band patch An out-of-band patch is a patch released at some time other than the normal release time. Microsoft, for example, normally releases patches on the second Tuesday of every month. A patch, sometimes called a "fix," is a quick-repair job for a piece of programming.
Yeah, I've been applying these "optional" updates even though my printer is not a part of the list of effected products with a v3 driver.