Hmmm...how recent is your copy of the APM? I've added the restrictions some time ago.
On the other hand, most of the packages in the CVS tree have .info files which declare that they will support both PG and Oracle. I did this in the optimistic hope that they'd all get ported. For my "pre-alpha snapshot" I hand-edited .info files to reflect reality at the time of the snapshot but didn't update the tree because some of the packages were (are) being actively worked on, but just weren't ready. Knocking out the DB support in the .info file in the development tree makes it difficult to work with the package while porting...
Old aD 4.x packages should only be loadable by Oracle, I *think* I've got that working correctly...I have to admit that I've not spent a lot of time testing this, though.
