Missing <user>.seen db files

[Eric Cunningham]

Hi list, I had a user report that their read message status was lost.  I 
recall having dealt with seen message db files in the past, but on my 
current implementation (2.5 on FreeBSD 10.2), I'm not able to locate any 
in or within my configdirectory, /var/spool/CyrusDB-Sieve/cyrusdb.  I 
have /var/spool/CyrusDB-Sieve/cyrusdb/user/u/username.sub but not .seen. 
  Would they be located anywhere else or perhaps the seen functionality 
is contained in another database file?  Without per-user <user>.seen 
files, how can 'seen' issues be dealt with for individual users?  Thanks!

		-Eric