I posted the following on the AOLServer list.
<blockquote>
  I have oracle 2.3, 2.4, 2.5 and 2.6 all as released from aD.
  I checked and the copy of 2.6 at Eve's site and the OpenACS tarball
  both match.
  <p>
  I also have the version from Jeremy Collins which he called 2.6 and
  was based on the aD v2.5 but there are a lot of cosmetic changes and
  it is hard to figure out what should be folded in to the next version.
  The diff from aD 2.5 -&gt; aD 2.6 is very small and easy to add to Jeremy's
  version but I am not sure how well his version has been tested.
  <p>
  There is also a later version than the 2.6 release which Rob Mayoff
  had (which hopefully Rob or Andrew will send to me shortly which was
  ora8.c v 1.60 in the aD CVS).
  <p>
  Also, there was a change that I never put into the released
  version since it was never clear to me what the right answer
  was (cf http://ccm.redhat.com/bboard-archive/webdb/000d9f.html )
  <p>
  I think what we should do is put up the 2.3 -&gt; 2.6 sequence, then
  try to pull in anything else that might have been fixed elsewhere
  and make that 2.7beta.
</blockquote>