seen db

[Eugene M. Zheganin]

Hi.

Guys, where is the seen database nowadays ? :) I used to think that it's 
stored in <imaproot>/user/<firstletter>/<username>.seen, these files do 
exist on my server but they seem to be irrelevant. I just truncated one 
of them and the seen information didn't go anywhere. Furthermore, they 
aren't touched by the server for a long time. Didn't manage to find this 
information in documentation, so I decided to ask here.

Thanks.
Eugene.