Let us look back to yesterday September 27th. I updated iTunes because Windoze people had issues. Mine worked fine and still does. Have you updated to iTunes 7? It is sweet.
Tonight the rest of the iLife sweet is being updated:

iWeb 1.1.2 This update addresses compatibility for accessing Aperture 1.5 content in iWeb.

iPhoto 6.0.5 This update to iPhoto contains new calendar, greeting card, and postcard themes for use with Apple print services, including a variety of holiday card designs. It also addresses compatibility for accessing Aperture 1.5 content in iPhoto.

iMovie 6.0.3 This update addresses compatibility for accessing Aperture 1.5 content in iMovie HD. It also improves overall stability and addresses a number of other minor issues.

iDVD 6.0.3 This update addresses compatibility for accessing Aperture 1.5 content in iDVD.

GarageBand 3.0.4 This update addresses compatibility for accessing Aperture 1.5 content in GarageBand.

Well at least it is not a Windoze issue. This is what Apple is all about. Every application working seamlessly with each other.