* Certain field formatting issues when using international character sets 
    are resolved, and no longer causes message verification failures.

  * The IMAP4 client/server interaction no longer triggers bad command limits 
    found in MS Exchange 2007, and other mail servers.

  * The v1.01 version is completely compatible with v1.0 configuration settings 
    and message store contents.  It is intended as a transparent replacement of 
    the earlier release.

  * Support for v1.00 has ended and all issues should be reproduced using v1.01.
  
  * New submissions using v1.00 will be accepted until 30 Sept 2010.  However, 
    SPEC encourages Mail2009 customers to upgrade to the latest version.