Exchange 2007 SP1 RU7 released today.   The following important SCR (Standby Continuous Replication) fixes are now available.

• KB 961281 Update Rollup 5 for Exchange Server 2007 Service Pack 1 introduced an error when you enable SCR for a storage group in an environment with a parent/child domain structure. See Tim's blog post for more info.
• KB 957834 This fixes an issue where network shares are deleted and created intermittently by the Replication service on a CMS in a single copy cluster when the CMS is an SCR source.
• KB 958331 This fixes an issue where Restore-StorageGroupCopy can fail in SCR environment.

You can download Exchange 2007 SP1 RU7 here.

http://www.microsoft.com/downloads/details.aspx?FamilyID=2074fefd-fa1a-4c3e-bf72-94585e454150&displaylang=en