Last modified: 2008-04-12 18:20:29 UTC
Steps to reproduce: 1-In any page which has more than 50 revisions in its history, click on "Earliest" to display the oldest 50 revisions. 2-You will notice that the "rollback" link will appear beside the "undo" link for the top revision. 3-When clicking on the rollback link, rollback fails. The rollback link should not appear. For an example see the provided URL (history of en.WP sandbox).
fixed in r33190.