There are numerous 3rd-party export plug-ins for Aperture that you can try. A lot of them are free, but many are available as 15-day trial demos. There are also trial versions that are available for longer periods of time, but...

By now I suspect most people are aware that the trial numbers people received early this morning don't work. If you're receiving the "invalid" error message, go back to the webpage and request a trial serial number again. The new...