I just uploaded new versions of Postfix 2.8-20100601 "experimental" and a release candidate for Postfix 2.7.1 "stable".
Both versions have the same fixes/workarounds for incompatible changes in MacOS 10.6, OpenSSL 1.0.0, and Berkeley DB 5.0.21, which were contributed from various places. At the moment I either don't have these systems or I don't use them enough to make a convincing test case, so it would be good if some people can confirm that the changes are integrated properly. Wietse