We've changed visual presentation of the bug record.
All bug fields are moved to the sidebar. The sidebar is always on the screen so the information is right before your eyes. Since labels are no longer needed, the conversation is moved closer to the left browser window edge. E-mail messages now look like a standard conversation. E-mail headers, such as From, To, and Subject are usually do not hold critical information and initially hidden from the view. You may open them by clicking View Header links.