Exchange 2007:

Exchange 2007 setup fails when the Setup program is preparing Active Directory for the installation of Exchange 2007

A contact user cannot use a custom contact form after a contact item is replicated to other public stores in Exchange Server 2007

You are redirected to a different server or you are prompted for your credentials two times when you use Outlook Web Access to access an Exchange 2003 mailbox through Exchange 2007

Exchange 2003:

The Microsoft Exchange Event service stops responding on an Exchange 2003 server

Event ID 206 is logged when you try to run an incremental Volume Shadow Copy Service (VSS) snapshot backup on an Exchange 2003 server

A uuencoded message attachment appears as garbled text in the body of a message in Exchange Server 2003

The calendar appointments in the public folder appear in the time zone of the public server when you log on to the basic version of Outlook Web Access for Exchange Server 2003

A MAPI program may not obtain a referral server when the global catalog server to which the MAPI program points is shut down

Saludos,
Vernocchi Pablo