I was able to build ships beyond the quantity of my currently available strategic resources.For example, let's say I have 2 units of elerium, and a custom prototype ship uses 2 elerium. Instead of allowing me to build just 1 instance of such ship, I can queued up 10 such ships in a shipyard. Ten turns later, I will own 10 such ships without owning the prerequisite amount of resources. The resource bar will show that I have -18 elerium (2 - 20). This throw the combat balance out the window since I was able to own ships more powerful with minimal investment (no need to build multiple constructors and race the AI to mine the strategic resources).