We recently turned on our mandatory auto-update for all versions earlier than 1.8. Some of these versions are pre-General Release, and some are just old. We want you to be able to use all our new features and get your work done using YouSendIt.
In even bigger news, we recently changed our name to Hightail (maybe you've noticed?) You may want to go to our website at www.hightail.com/applications to download our latest version, which is 2.4, and is all Hightail all the time.