Mac OS X 10.4.6, released today as a free update for Macs running an earlier version of OS X 10.4.x, slightly changes the TIFFs exported from Aperture. Specifically, exported TIFFs will now contain the EXIF shooting data found in the source picture. In addition, Aperture will no longer quit unexpectedly when exporting a file with keywords that contain twelve or more Cyrillic characters.
Mac OS X 10.4.6, both client and server versions and for both PowerPC and Intel Macs, is available via the Software Update feature of the Mac OS, as well as in a standalone installer (be sure to select the right installer for your system). If you use iSync to manage the synchronization of your calendar and contact information between your computer and handheld device, be sure to read this page before installing 10.4.6.
Mac OS X 10.4.6 will almost certainly be required to take advantage of the RAW conversion quality changes planned for the upcoming Aperture 1.1. The new version of Aperture is now slated to ship sometime in April 2006.