Firstly, in MasterTechDefs.xml (Retribution) there is this : AICannotTrade it is a boolean, default to false (true and false the only options). However it is currently been used as an xs:int or FixedDecimal for 22 instances:
<AICannotTrade>1</AICannotTrade> should be <AICannotTrade>true</AICannotTrade>
Secondly the current Tech Costs are all over the place after the restructure of the tech tree for Retribution, here is an example:-
Beam Weapons to Doom Rays there are total 10 techs (12 if you count all 3 specialities) in this line, the tech costs are as follows:
100 - 150 - 166 - 800 - 600 - 241 - 700 - 350 - 1000 - 2054
This is a common occurance all the way through the Retribution technology tree.