i'm still chasing funny behaviour :)
so as i said before i have the first box as my *INBOX* and and the second
one for 'recent' threads: [nm_query_type=threads]
"drw [->]" "notmuch://?query=folder:drw AND tag:unread" \
" [..]" "notmuch://?query=folder:drw" \
now mark a msg in [..] 'N' but don't 'open' it. as soon as you change
vfolder, it will be in [->]. now marking it 'N' anywhere, including in
[..], that is after at least one change-vfolder, won't remove the 'unread'
tag (it's still in [->] and if you have
set nm_hidden_tags=
then you see that it's still tagged 'unread')
now mark something else 'N' in [..], then either 'open' it or mark it
'N' again, without changing vfolder and it won't pop up in [->]. so in this
case 'N' did tag and untag 'unread'.
so to summarise:
hit NN on a msg, tagged unread then untagged unread
hit N, then vfolder-change, then N on the same msg, first N tags it unread,
second N doesn't do anything about unread tag.