Great to hear Navajo! Knowing the back end and the code pretty well, I can understand how it was cumbersome to store the posts as it was, but its great to hear this is going through an overhaul and the arrows are not necessarily the final version.
DrChaos - I believe that Josh posted about a hack already out here or in development that would return thread links to the way they currently are in 6.4.x. If not, it should not be hard to change and I would certainly do so and post it.