FYI for Garmin/motionbased Mac OSX users
If you use a site like motionbased to track your mileage and your a OSX user, do not upgrade to the latest version of Safari (3.xx). You will no longer be able to upload to Motionbased. They say that they are working on the problem and by the end of the summer they will support all broswers, but at this point, stay with 2.0.4.
If you have already updated to v3.0 open the .DMG file and inside, you'll find an uninstall program and it will revert to your last version