When you enable Business Activity Monitoring (BAM) tracking in Microsoft BizTalk Server 2010, you discover that the XML declaration of a message no longer works.
This issue occurs after you install BizTalk Server 2010 Cumulative Update 7 (CU7) or Cumulative Update 8 (CU8). This issue also occurs in BizTalk Server 2010 RTM to CU5, and it's fixed in KB2689953 of CU6. Because of other changes in CU7, this issue was reintroduced in CU7.
Cumulative update information
This issue was first fixed in the following cumulative update of BizTalk Server: