[Courier-imap] UID Substitution w/email Address That Starts With a Number

[Pocketmail O. <poc...@gm...>]

I've noticed a problem with the current (and presumably past) versions of 
Courier Imap.  We are using ldap as the authentication method and it appears 
that if the email address of the account starts with a number, then Courier 
Imap uses that number as the UID to access the email rather than the UID set 
in the configuration files.  Is there a way to stop this behavior?