I probably would never have noticed this but I was trying to use the function in CHIRP where you can query/import from RR. Every time I put in a Baltimore City Zip code, it threw an error. I reported this to the guys at CHIRP, and the troubleshooting led them (and me) to try to search the RRDB via Zip code. Sure enough, it's broken. No error message, just reverts back to the Search page. Baltimore County and other surrounding county Zip codes worked fine.