I would first blame Chrome if you use the dev channel of Chrome. Try beta or stable channel and see if you still have issues. Also note that you can not set break points in grey lines since they do not have source mapping information.
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to firstname.lastname@example.org.
To post to this group, send email to email@example.com.
Visit this group at http://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.