[Users] Flush old logs

Hi, I'd like first to thank people of this mailing list for there help and advices - I learned a lot by reading your archive. Here's a simple question : In the "Alerts" message queue at the bottom of the screen, I see an error message dating from two weeks (about the failure to verify to restart status of a host). I'm pretty sure this shouldn't be there anymore, as the power management of this host has already been tested and approved many times since. I haven't find any trivial way to flush this message queue, and I was wondering whether it was stored in a database? Is there a way to clear these error messages? (Am I right with the db location?) Regards, -- Nicolas Ecarnot