Changeset [742] manually replaces CMFCorePermissions with permissions in init.py and config.py, as recommended for future-proofing; however, this portion of the code is automatically generated by ArchGenXML.
AGX 1.5.0 (currently used for PleiadesEntity) overwrites this change with the old style CMFCorePermissions imports (verified). AGX 1.5.2 was the last release for Plone 2.1/2.5; current development in SVN head is focused on 2.5/3.0 with the goal of an eventual AGX 1.6 release. Inspection of the current SVN head reveals that AGX 1.5 templates that used CMFCorePermissions now use permissions, which is what we want.
But we need to do a full, careful test of an SVN-generated PleiadesEntity before commiting to the upgrade; there are a lot of changes in there.