If you're going to restore a Nandroid from CM74D2 that was running on the GB leak kernel, make certain you don't have Jake's v3, V2, or V1 mods on that build...if you restore that you'll get boot loops and have to SBF (ask me how I know ;-)). The OTA GB only works w/Jakes v4 release, which came out after GB OTA was released...