I just upgraded to 90.94 on Mac OS 10.6.1 (snow leopard). When I add a new Module to a project that includes the Google App Engine facet I get an error:
"Error adding module to project: Argument 2 for @NotNull parameter of com/intellij/packaging/impl/run/BuildArtifactsBeforeRun.setBuildArtifactBeforeRun must not be null"
When I click OK, the module is created with the GAE template directory structure, but I have to go back to settings and set the Content Root by hand. Also, the WAR Exploded build artifact is not configured.