Deliver to mailbox problem with v2.4.7

[John]

Good afternoon,

I have just upgraded from Cyrus-IMAP 2.3.15 to 2.4.7 and my mailbox 
delivery has stopped working.

My procmail delivers mail using a command similar to the below :

/usr/cyrus/bin/deliver -a john -m folder/subfolder john < message

This would result in message being dropped into john/folder/subfolder

Since the upgrade everything is delivered to john/INBOX; the "-m" 
argument appears to have no effect.

Is there something with this upgrade that I need to be aware of, that I 
am now doing wrong?

Thanks,
John