Apple has released a new support document for its Aperture photo editing and management software for photographers. Version 3 was introduced earlier this month.
After you upgrade Aperture from an earlier version to Aperture 3, Aperture may quit unexpectedly when opening or when you enter the Aperture 3 upgrade serial number, Apple says. The support document (http://support.apple.com/kb/TS3231) offers advice on resolving the issue.