As a "clear" example of the trouble we (customers) are set, I can see two different Release Notes on http://support.arubanetworks.com
Aruba Instant 6.4.2.0-4.1.1.1 Release Notes.pdf
One in the software download section, and one in the Documentation section.
They are not the same : one is "0511589-05 | November 2014 Aruba Instant 6.4.2.0-4.1.1.1 | Release Notes", saying nothing about mesh limitations.
and the other is "0511589-06 | November 2014 Aruba Instant 6.4.2.0-4.1.1.1 | Release Notes" stating that "No Support for Mesh on IAP-2xx Series Access Points".
Again, I understand the technical issue, but the documents must be clear.
Happy 2015 to all