I’m using Snow Leopard (10.6.2). I created an Automator workflow to create a .dmg file from a folder. I get an error message ‘The action “Create Disk Image or Archive” could not be loaded because it is not Universal.’
The action actually is Universal, but Automator on Snow Leopard wants it to support garbage collection. If you’d like to try a pre-release version, please contact me via e-mail.