There has been a re-release of the Office 2007 security and non –security updates released May 8^th.  The re-release has  changed the detection logic however none of the actual binaries in the updates have been modified.  Reapproval will not impact any clients with the initial  approved updates installed.   Read more about the re-release on the MSRC blog, your source for security update news and information.

http://blogs.technet.com/msrc/archive/2007/05/17/new-detection-logic-for-may-8th-office-2007-updates.aspx