Grails 1.1 does not allow the classname Category

There are tutorials around for older versions of Grails that use Category as a class name. However since v 1.1 this name collides with the Groovy-class groovy.lang.Category. If you use it you get the error  “ERROR plugins.DefaultGrailsPlugin  - Cannot generate controller logic for scaffolded class interface groovy.lang.Category. It is not a domain class!” It took me two hours to find out about that. Even googling was not very successful. As you can imagine it drove me mad. So don’t use Category, even if you want to create a category class! Use something else…