quota warning problem - Is it a bug of cyrus imap?

Mon Jun 30 21:50:13 EDT 2003

I have installed cyrus imap 2.13 recently and it works very well ecept
when the mailbox data reaches big volume. On a 10G quota for a mailbox
the server starts warning the outlook user and closes the connection
when the used space is just al little over 15% of the quota.  But for
small quota the server works fine- it starts the warning at 90% of the
quota limit. Is there anyone on this list aware of this problem? 

Best Regards,
Daniel Qian