Make it through the entire tech tree (on enternity) and found a bug where 2 of the most expensive techs in the game end up costing 1 breaker, likely due to the tech costing too many beakers so the game reads it as 1 once it exceeds a certain power of 2 (2^25 I think is the magic number here). Not that big of a deal IMHO really not a gameplay issue or anything.