Just thought that might interest some people. I stumbled over a bug in Groovy's handling of annotations while translating some components from Java. It is known and already filed here: http://jira.codehaus.org/browse/GROOVY-3278
You can't use static constant variables in annotations, so @Parameter(defaultBinding = BindingConstants.LITERAL) won't work for example, while @Parameter(defaultBinding = "literal") will. This is quite a bit of a putoff, since if you start a bigger application now you might run into problems when upgrading Tapestry at some time in the future and also it might affect your own component parameters when you work with enums or constants. It's not fixed yet in 1.6.1-SNAPSHOT but hopefully it gets worked on soon.
