Cumulative update package 1 for BizTalk Server 2010 is now available.
This cumulative update for Microsoft BizTalk Adapter Pack 2010 contains hotfixes for Microsoft BizTalk Adapter Pack 2010 issues that were resolved after the release of BizTalk Adapter Pack 2010.
BizTalk 2010 CU1 includes 31 hotfixes, most of which are related to BizTalk Adaptor Pack (BAP) and EDI.
To know more about this CU check Microsoft Help and Support or Guru Venkataraman post which have some interest details about hotfixes per feature area.
Note: The cumulative update package is intended to correct only the problems that are described in the Microsoft Help and Support article. Apply the cumulative update package only to systems that are experiencing these specific problems. This cumulative update package may receive additional testing. Therefore, if you are not severely affected by any of these problems, Microsoft recommends that you wait for the next BizTalk Adapter Pack service pack. The next service pack will contain the hotfixes that are in this cumulative update package.