AFAICT, the warning originally was added because gwt-dev bundles various dependencies, such as Xalan and Xerces, ECJ, Apache Commons, Jetty, etc. that could conflict with dependencies you use for your server-side code. That said, using the same project for client and server sides is a bad idea, and violates The Maven Way™, so in practice gwt-dev should effectively not be a problem. FWIW, I do believe that warning should be removed.
Also, BTW, you should have rather posted to the gwt-maven-plugin users group, or the GWT users group. -- http://groups.google.com/group/Google-Web-Toolkit-Contributors --- You received this message because you are subscribed to the Google Groups "GWT Contributors" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit-contributors+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
