I loaded the leaked update as well. Got stuck in the boot loop and had to factory wipe. Did it 3 times then rebooted. Rom works but it lags. Not sure if i missed a step or if I have been spoiled by the other ROM like liberty and Rubix i was running before??
these are the steps you should have taken.
coming from a 2.3.40 based Froyo ROM (like liberty, apex ect)
you can flash it just like any other ROM but you MUST wipe data AND cache
coming from stock 2.3.40
gain root access if you haven't already (using something like Z4root)
use DX bootstrapper to boot into clockwork
flash the file like you would a rom. a wipe is not necessary, but if it bootloops you will need to wipe. i would do a full wipe either way just to be safe.
coming from unrooted GB
you MUST SBF back to 2.3.340
once finished, before you boot the phone, boot into stock recovery, wipe data/factory reset
boot phone
grab Z4root and root the device.
grab DX bootstrapper
boot into clockwork
wipe data/cache
flash rootedGB .zip file
sign in, and let all your apps download.
use titanium to restore app data.
after that, all should be good.
that is EXACTLY what i did, along with the CRT screen off animation, and deodex .zip, and my phone is running flawlessly. GB is a huge improvement so far over every custom ROM i have ran....moto really did a nice job on it.