This is a warning for those looking to flash the leaked Gingerbread version from Team Black Hat. I have been doing some experimentation today with GB and here are my findings:
1. Once you flash Gingerbread you cannot return to your old 2.3.340 system by using the Maderstcok.zip file. You will get stuck at the M logo or bootloop.
2. Once you flash Gingerbread you cannot return to your old 2.3.340 system by restoring an old backup. You will get stuck at the M logo or bootloop.
3. You can use the TBH app's Monster.zip file called (full2.3.340 SBF file) (update.zip format)) in the TBH app to go back to 2.3.340, but Do NOT try and re-flash GB without doing a full SBF from a computer first. You will get stuck at the M logo or bootloop.
So if you are not familiar with how to perform an SBF but you want Gingerbread, know that you cannot go back until you learn how to do it. Here's the SBF flashing Guide. (thanks Maderschramm)
Note Do NOT use any SBF file besides the full 2.3.340 sbf file. Get the SBF file, RSDLite (4.9 is the latest, but others have had success with the earlier versions as well) and the Moto drivers (whether 32 bit or 64 bit) for Windows here:
Droid X SBF files (thanks 1KDS)
1KDS's has also created an all in one SBF solution. He packed a small Linux distribution along with all the files needed into one .iso file that can be burned and booted from cd or USB drive. Nothing to install, Windows users! A couple of clicks and you're SBF'ing.. It just doesn't get any easier than this folks! Here is the thread: