[MlMt] Can't change message status to UNread

[Randall Meadows]

On 1 Oct 2018, at 7:28, Benny Kjær Nielsen wrote:

> On 25 Sep 2018, at 20:01, Randall Meadows wrote:
>
>> Is this a known (or a new) bug, or in the midst of my other MM woes, 
>> have I screwed up some setting?
>
> It might be a new bug.
>
>> I am utterly unable to change a message's read status back to unread, 
>> for ***most*** messages, although I haven't been able to figure out 
>> exactly what the trigger for it failing is.  Upon an attempt to mark 
>> a single read message UNread, MailMate immediately reverts it back to 
>> read.  If multiple messages are selected, this does not happen.  You 
>> can see this in action in the following video screen capture:
>
> What are your Viewer preferences settings for “Mark messages as 
> read”?
>
> I guess it could be triggered if MailMate (for whatever reason) 
> redisplays the message when you make it unread. (The redisplaying 
> would be the bug.)

I'm pretty sure this was what was happening (the redisplay), as it was 
quite obvious that this was occurring.  But I've already nuked from 
orbit and completely configured everything from scratch, which made that 
(and other issues I was having) go away.