Actually, the Editor framework underwent a complete rewrite between 2.2 and 2.3. There are only few visible changes though: introduction of EditorDriver base interface (with setConstraintViolations, so "error reporting" is now available on SimpleBeanEditorDriver too), EditorVisitor and HasRequestContext.
You might be running into this issue: http://code.google.com/p/google-web-toolkit/issues/detail?id=6081 See also: http://code.google.com/p/google-web-toolkit/issues/list?can=1&q=Editor%20status=ReviewPending%20milestone=2_3 -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
