Jen
See http://trac.edgewall.org/ticket/1347
For now, you can use some SQL commands to get rid of old sessions of
user "joeuser" this way, assuming you're using a SQLite backend:
> sqlite3 /path_to_trac_project/db/trac.db
delete from session where sid='joeuser';
delete from session_attribute where sid='joeuser';
.quit
Note: run the "sqlite3" command with the same user as your web server,
for example:
sudo -u www-data sqlite3 ... on Debian
HTH,
Manu