I read your comment in the Post V2 update thread, but figured I would comment here since this was started by you. In NOLA, you are probably trying to listen to the simulcast sites (north or south). While not perfect the upgrade did, in fact, make them at least monitorable. Prior to the upgrade, those sites were mostly unintelligible on Uniden and RS (if only using the 800 MHz channels) scanners whereas the newer GRE models performed better. After the upgrade, the Uniden models at least allowed you to follow a conversation. That said, there is quite a lot going on in NOLA, and there are a lot of frequencies being used. On the north simulcast site (I have not monitored the south site for any length of time), I know that not all of the repeaters are timed just right; this is based on my listening (when in town) and noticing that some frequencies are more garbled than others. This is not just a scanner problem, but also a system problem. Occasionally (not often) you will here a dispatcher or unit ask for a repeat because of the same garbled performance.
Now, you should be using software with your radio. The UASD software (from Uniden) is free (if money is an object) and would serve to help you put things back in order. If you had backed up everything before the upgrade (as recommended) you could just reload the backup and you would be good to go. This firmware update does (unintentionally) change some things in the radio setup and you really need to reload the radio. I would recommend downloading a software product, and building your new stuff from there. If you go with the UASD software, contact me via PM with your email and I would be glad to send you what I have (although you probably would want to just use it as a starting point).