Apple has today posted two updates, one for Aperture 1.1 and the other for Logic Express 7.2.
The update to Aperture moves it up to version 1.1.1 and is around 14MB in size, Apple describes the update as follows:
This update addresses several issues related to performance, stability, color correction, and display compatibility and is recommended for all Aperture users.
Note: You must first update to Aperture 1.1 and Mac OS X 10.4.6 or later before installing Aperture 1.1.1.
What looks like a typo has appeared on Apple's website in relation to the Logic update, World of Apple is unable to confirm whether this update is for Pro or Express or potentially both.