I've added a new LogPanel to workspaces and integrated gwt-log. (https://jira.jboss.org/jira/browse/ERRAI-47) Anything logged now goes to that panel which opens automatically when a certain log level threshold is reached (Level>ERROR). It's interesting to see that there are much more errors being thrown, then we are aware of ;) However, in order to realize this, I've added the possibility to register a LogAdapter with the ClientMessageBus. Per default (bus on it's own) it uses GWT.log() and the well know popup window that we used to have. Workspaces registeres a custom LogAdapter the pipes everything into gwt-log. Happy debugging, Heiko