Had a service appointment today at the Buena Park SC for an unrelated issue. Told them about the smell coming from the vents when using the AC and the SA said it was a known problem that would be fixed via a firmware update. He said that when too much moisture is getting trapped, odors can happen. So the update is apparently going to make the fan work a little more to make that moisture go away before automatically shutting down....his explanation Didn't say anything about changing the filter or anything like that. Who knows.