Commonly when reading and responding to email the first thing I do is detach the attachments into appropriate folders or more importantly, to detach a calender invite to open it in mac's calender. BUT this marks the message unread and immediately removes from the Unread message folder, STR Open Inbox, Quick-Filter Unread Click on message with attachment Detach attachment using menu at bottom. Notice message disappear from index - no longer able to reply to the message without unchecking 'Unread' locating message and then switching back to Unread.

Seems like catch 22 situation, no? How would you do this in light of the fact that the "normal case" for handling such a message is that it *should* be marked unread because the message has been touched?

I'm not saying it shouldnt be marked Unread, compare the two cases . Open Inbox Quick-Filter Unread - i.e. only messages Unread *AT THIS POINT* are displayed a) Click on a mesasge - read it - its now marked Unread (header changes from bold to normal) ***BUT** it reamins in the list, so I can go back to it, delete it, reply to it etc b) Click on a message - Detach file - not only is it marked Unread (correctly) **BUT** the message is removed from the Unread list of messages. I think these should be treated the same - i.e. left in this listing (which is now showing Unread and recently Read) until the same triggers that cause it to be redrawn and messages of type "a" removed. Note there is a related bug , where removing an attachment changes the order of a message within a thread - moving it to the top, rather than its chronological order, but I cant find that on Bugzilla now - I think someone decided it wasn't a bug, and it wasn't worth arguing about.