I am running the same extensions on both versions. The iheart radio site loads and runs on version 49.01 (64 bit), however when a station is selected and the iheart player comes into play it a half circle keeps going around the white square and the sound never starts. I am running the default plugins and all are activated. The 32 bit version works just fine. When a station is selected the half circle runs around the square a couple of times, then stops, and the sound starts. Iheart is only available in the United States so I suspected that it may not be able to locate me since I saw a location query go out to Google while it was trying to start the player. No errors of any kind occur. I invoked about:config and searched for "locations" and found a Google entry that seemed to match what iheart was looking for. However, when I tried to open the site using cut & paste I got an error 400. MSN has an almost identical entry and that one worked and knew my location. There doesn't seem to be any further information on the subject. All other aspects of the 64 bit version seem to work just fine, except that it doesn't seem to always close properly. But that is a better addressed as a separate issue. I will be happy to get the iheart radio problem resolved. I am running Windows 7, 64 bit - 8gb memory - Abit cpu. Speed test = 23 MBPS. I have disabled the obvious add-on's like Ad-Block - Classic screen restorer - and etc to no avail. Silverlight is also installed but deactivating it had no effect. I am out of ideas. Any help would be appreciated. Thanks in advance...