Between 7.4 and 8.0, the owner's grant options were removed from the
aclitem display. This was as a side effect of the fixes of bug #1150,
but I can't readily tell anymore for what specific reason this
happened.
The information schema shows obviously inaccurate data now, and it might
be easy to fix, unless there was some overriding concern that someone
might recall.
--
Peter Eisentraut
http://developer.postgresql.org/~petere/