The announcement for a given release includes a listing of enhancements, but there is currently no way to get this information from an OEPE release page on OTN. I will raise this issue. In the meantime, if you have questions regarding content of a particular release, you can ask on this forum.
Thank you for the reply. Is OEPE 184.108.40.206 supported only on Juno or Indigo also? http://www.oracle.com/technetwork/developer-tools/eclipse/overview/whatsnew-089747.html says "This release of OEPE supports Eclipse Juno (3.8.1 and 4.2.1)."