Prior to January 23, 2008 at 00:30 UTC, the download link for 2.1.rc3 was in fact providing an older release. If you downloaded Echo2 2.1rc3 before this time, please re-download a new version immediately. While this problem did not affect all downloads, we highly recommend that you download a new version now to be certain you have the correct item.
You can verify that you have the correct version by one of two methods: