Another point - The recall mentions "...pawls that could "disengage from the extension lifting post" under a shift in weight, causing them to suddenly collapse". On mine the "Extension Lifting Post" (Center piece) is cast iron, and the pawls are steel. The ridges in the post appear flat and sharp at the ends, and the pawl seems to be meaty and a good edge that engages well. (Still they are going back)
My point is if you have any kind of jack stands, it would be a good thing to pull up and out your extension lifting post and inspect the points of engagement, as well as look over the pawl to insure that it engages well.
I see how this could be an often overlooked safety inspection, as well as be certain that when in use, be extra sure that the pawl is fully engaged BEFORE proceeding with the work at hand. With most, the handle is attached to the pawl, and "Flips" to a certain position when fully engaged. THAT is the position we should look for when putting them in service.
SAFETY FIRST!