I need to know the precise definition of guaranteed balance before I can provide a fix. I wrote an alternative implementation of Account.getGuaranteedBalance(), but it is giving me different results than the original getGuaranteedBalance() which CfB wrote. While trying to track down why that is, I found a few things in getGuaranteedBalance() that don't make sense to me, but I don't know which are bugs and which are a part of the Transparent Forging design. I cannot continue with that problem until I know how exactly it is supposed to work.
I am waiting for a response from CfB. In the meantime, I will continue my work on 0.6.0.
Thanks for the update! Bummer...
Next time CfB mentions decentralization, I'll point him here... ;-)