Apple has posted updates to the latest version of iWork:
Keynote 3.0.1:
This update to Keynote 3.0 addresses issues with three-dimensional charts and textures. It also addresses a number of other minor issues. This update should be installed on all computers that share your Keynote 3.0 files, so that textures display properly.
Keynote 3.0.1 download link and detailed description.
Pages 2.0.1:
Pages 2.0.1 addresses issues with charts and image adjust. It also addresses a number of other minor issues.
Pages 2.0.1 download link and detailed description.
Apple released iWork '06 in January 2006.