Apple has updated GarageBand to v5.0.2. This update addresses general compatibility issues, improves overall stability, and fixes a number of other minor issues.

The issues addressed include:

• Improved purchasing experience for Artist Lessons in the GarageBand Lesson Store.
• Accessing installed Jam Packs in the loop browser.

The update is recommended for all users of GarageBand '09 and is required to use the Lesson Store.