I went back and read the OP post. I don't think I took the full OTA update when I first flashed over, I think I only did the incremental.I'm not quite sure a full update is needed, as it's only necessary if you're rooted, but perhaps for some people it is? The "about phone" thing shouldn't mess with it, as the phone still identifies itself correctly to the servers and to the Play Store. I think it's a cosmetic thing, really.
Now, if I download the full OTA update now, is that going to brick my phone, wipe me phone etc?