GarageBand: Chapters may not export in Snow Leopard
GarageBand, GarageBand '08 (4.x), GarageBand '09
When you send a podcast to another application or export it to disk, the chapter markers and marker region artwork may not be included if you are using Mac OS X v10.6 Snow Leopard.
This happens if you have an ampersand (&) or other special character in the chapter titles. Remove the special characters before sharing the podcast.