The /direct/membership/site/!admin.json should retrieve membership for the admin site, but instead returns a 403 HTTP error. This is used by adminlite to check if current user is an adminlite member and if so - remove (hide) all the tools. Same url with any other site ID (that I have tested) does the right thing (retrieves the json representing the membership in the site).
This works fine on Sakai 2.9 QA servers
The result of this is that AdminLite users can't see any tools in the Admin site.