Replying to my own post ... it looks to me that you don't need the sources jars in your WEB-INF/lib, just your compile path for the GWT compile phase. Not having them in WEB-INF/lib could be important if you're using GAE.
If anyone's interested, here's how I did it: http://objectuser.wordpress.com/2011/09/12/gwt-bean-validation-how-to/ -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/ZXCa87173FsJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.