trackers caching information for too long?

[Javier Frias]

I've noticed that after deleting or modifying a class or domain in
mogile, I need to restart all the trackers. Do the trackers keep some
sort of persistent cache? can i force it to be purged when i do a
mogadm modification? Is this a bug and i should upgrade?

Errors where:
RESPONSE: ERR unreg_class unreg_class

until i restarted all the trackers, then it went away ( and i verified
it by restarting one by one, and as i restarted, that one would stop
throwing errors )

thx