On the magritte and seaside lists Bruce Prior explains that loading stable versions of Seaside and Magritte doesn't result in having a working combination. project: 'Magritte3' with: [ spec className: 'ConfigurationOfMagritte3'; versionString: #'stable'; loads: #( 'Seaside' ); repository: 'http://smalltalkhub.com/mc/Magritte/Magritte3/main' ]. Stephan