gwt-contrib, I just submitted r10381<http://code.google.com/p/google-web-toolkit/source/detail?r=10381>that changes the GWT comment style from 80 columns to 100 columns.
If you receive the error "Building workspace has encountered a problem - errors running builder 'Checkstyle Builder' on project gwt-user", you will need to re-import the GWT custom checks. To do this, copy "svn/trunk/eclipse/settings/code-style/gwt-customchecks.jar" into <eclipse>/plugins/com.atlassw.tools.eclipse.checkstyle_x.x.x/extension-libraries/gwt-customchecks.jar, then restart Eclipse. Thank you, Philip -- http://groups.google.com/group/Google-Web-Toolkit-Contributors