My Experience Rooting
My NC came with 1.2.
I followed the direction at:
http://xdaforums.com/showthread.php?t=1054027
I first upgraded from 1.2 to 1.3
Followed the rest of the procedure.
Everything went fine until I opened the Market. Many applications were not listed. Applications such a the Dolphin Browser and my application, BASIC! + SQL. Reading the thread showed me that I was not alone. It seemed that no one was able to get the full Market using this procedure.
I trudged through the thread looking for ways to get the Market to work correctly. I tried many of the suggestions. Nothing worked to get me access to the full Market. I finally came to the conclusion that 1.3 + Gingerbread was a Donut (Pun intended).
I decided to revert reset my NC to the factory original factory 1.2 ROM. I did this by following the instruction at:
http://www.nookdevs.com/Flash_back_to_clean_stock_ROM
I used the method of interrupting boots. I found that I only had to interrupt three boots. The Nook then proceeded to completely return to a fresh 1.2 all in one step. The Nook started up just like it came out of the box.
I then went back to:
http://xdaforums.com/showthread.php?t=1054027
And followed the procedure for 1.2 but instead of loading ManualNooter-4-6-16.zip, I used ManualNooter-4-6-16a.zip. The "a" version link can be found at:
http://xdaforums.com/showpost.php?p=17235819&postcount=1
(Note: I did not flash 4-5-18)
After executing the re-flash procedure, I rebooted into 1.2 with FroYo.
All Market applications are not available. I was able to install Dolphin and my application.
Happy day.