Folder keeps showing new messages

[RLB <redlob+mutt-users@xxxxxxxxx>]

Hi guys,

I'm using Mutt with IMAP. When I start Mutt, I can see which folders
have new messages. When I enter a folder with new messages, and leave it
without reading any, the new message counter is reset to zero (when I
look in the folder list). This is fine.  However, when I close and
restart Mutt, the counter is back to the number of unread messages. I do
not want this behaviour, en keep the unread message to zero.

How can I avoid this ?

Thanks.  
Dick