Comment by ivancevic.nikola: Works fine (Windows Vista 32-bit, jdk 1.6.0u13, Eclipse 3.4, GWT trunk rev5557, FireFox 3.0.11).
With jdk 1.6.0u14, after the page has been opened, it is needed to reload it once more in order to activate breakpoints. For more information: http://code.google.com/p/google-web-toolkit/wiki/UsingOOPHM --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---