hi. i've noticed that as my gmail account is getting larger that rc seems to be getting slower. after turning on debugging and checking the logs it appears to be caused the number of imap calls and the varying time it takes to get a response. i've set both imap_cache and messages_cache to db thinking that this would reduce the number of imap calls required but i'm still seeing calls to retrieve messages that i've seen inserted into the messages table of the db. with these options set, shouldn't rc retrieve a message from cache if it is available rather than retrieving it from the imap server and thus i should see a select from the db rather that an imap fetch, or have i completely misunderstood ? cheers.