Currently there is not a document which outlines this. The release notes are were the updates for the product can be found.
We also have a document which describes the features of the latest Avalanche but it does not go into what was different from previous version. This document can be found from the following link: http://www.wavelink.com/product/pdf/datasheet/avalanche-mc.pdf
One note when speaking of Avalanche is that all of the 3.x versions are end of life and are no longer supported.
1 of 1 people found this helpful
There is a document that covered new features in the 5.0 Enabler, here:
It's not exactly what you were looking for, but may help.