For some reason, drupal-org.make says it has

projects[admin_menu][version] = "3.0-rc5"

Even though it really is 3.x-dev from before that release:

projects[admin_menu][download][revision] = "b07d37b8"

7.x-3.0-rc5 is out now and includes some good stuff like #2392519: Remove 'Disable Development modules'.

Any other places the version number is faked should be removed too. If 3.0-rc5 had been a security release, update status might not have been able to know about it.