[Dovecot] virtual mbox case sensitive?

This is on dovecot 1.1.rc4.

I have this mail_location:

mail_location = maildir:/apps/mail/%d/%n/Maildir

When I receve mail to a virtual mailbox, its putting it in different Maildir's depending on what the sender used for the caseness of the recipient's email address:

I have these Maildirs:

JasonK JuliaM info jasonk juliam

JasonK and jasonk should be the same maildir. So should JuliaM and juliam.

Now the 2nd question is, how do I "move" the mail from JasonK back to jasonk?

Thanks, this is very odd!