I've just bought a new computer (Acer, Vista, IE7, Norton Internet Security) and have the same problems everyone else is describing. My old machine was a Gateway with XP SP2, IE6 and NO Norton; I was using AVG Free Antivirus software and other adware/spyware software and had no problems with the new maps. I have installed Firefox and have no map problems with that browser. It would seem, after reading through a lot of the logs in here, that Norton may be the culprit in this issue. I have yet to do a complete uninstall to check this out but plan to do it once I get all the software lined up that I was using before. I have to agree with the majority here: with so much input on this matter, I find it hard to believe that Groundspeak can't reproduce this problem.