I have previously posted that I installed the update from
http://su.barnesandnoble.com/nook/no...1_1_update.zip.
Now I am unsure as to if it did actually install as the software version shown in the About Your NOOK page has not changed.
The NOOK has done something with the package I loaded into it, because the ZIP file is no longer there.
It is possible that the Rooting I've done with my NOOK may disable the updating, but I personally don't know how to find out exactly what has happened here.
WaferCat