had the same problem, driving me nuts - it cost me a fair bit on the auction of my boat , as people can do specific postcode searches for your item. The adress just wouldnt bloody change. Anyway its nothing to do with google chrome its to do with ebay. I have spent the last hour and a half on the live (nearly dead its so slow) chat. There is a coding error. Tech team is working to resolve it. Fortunately for me i had written on my ad halfway through the auction that i couldnt change the adress. Ebay is adamant that this is a problem that has only just happened. But my auction was 6 weeks ago, and i tried to list another item tonight with the same hassle. Anyway due to the adverse effect this has on an auction ebay was good enough to refund my $55 in fees. My advice is go through the process with the live chat, it takes a looooong time, but then they were great:)