I am getting a different MD5 sum for ZODB3-3.2a1.tar.gz than the one posted on http://www.zope.org/Products/ZODB3.2 , which says it should be: dac071dfc9e154c2a4eb3e11e07bca67 ZODB3-3.2a1.tar.gz I've used two versions of md5sum one on Linux, one on Windows, and downloaded another file AdaptableStorage and my md5sum matches the one listed for that file. Rich