Aperture sometimes quits unexpectedly after upgrade to Mac OS X 10.5 Leopard

Issue or symptom

Aperture sometimes quits when starting up after you install Mac OS X 10.5 Leopard.

Solution

This can happen if you use Aperture 1.5.4 or earlier. Update to Aperture 1.5.6 or later to resolve this issue. You can get the Aperture 1.5.6 update here. Additional information about the Aperture 1.5.6 update can be found here.