Default [Q] First 4.2.2 OTA Failing

I have a Droid DNA on 2.07 with moonshine S-off and CWM recovery. When I try to install the first 14.7mb ota cwm gives me the error: assert failed apply_patch_check( /system/build.prop, ... ). /system/build.prop is the only file in /system that I have modified but I forgot to make a .bak of it when I did. I found a stock 2.07 rom and copied its build.prop (after saving my current build.prop as build.prop.bak) and the phone doesn't boot correctly. As far as I can tell, the text contents of my current build.prop and the one from the rom are identical.

Any suggestions? Also, has anyone had issues keeping root after the 4.2.2 OTA?