Barnes & Noble recently added over 100 comic book issues from DC comics to the NOOK Store, allowing NOOK Color and NOOK Tablet users to purchase and read Batman, Superman, and other comics on their tablets.
The company also released a minor software update adding zoom view in comics and graphics novels, 2-page mode in landscape for viewing PDF and PagePerfect documents, and a few other tweaks.
As usual, the software update can be a bit of a pain in the neck for anyone who rooted their tablet. If your NOOK Tablet downloaded the software version 1.4.3 update automatically, it probably also killed your root access and may have left you unable to launch some of the apps you’ve installed.
You can also find a more involved step-by-step guide for rooting the NOOK Tablet and blocking it from downloading future software updates at the xda-developers forum.
One of the best ways to prevent a NOOK from downloading updates when you’re not looking is to chuck out the default software altogether and install a custom ROM such as CyanogenMod.