404. That’s an error.

The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Fwww.dilbert.com%2Fstrips%2Fcomic%2F2007-12-16%2F&title=Dilbert+Daily+Strip%3A+2007-12-16 was not found on this server. That’s all we know.