[Q]

There is something wrong with very large fighter Groups. I could not reproduce the "integer overflow" crash until now, but try once a fight with 300-400 large fighters in one group against 100 large sats in the combat simulator: after the first shot and the destruction of some 50 fighters the group had no supplies left! I used the Abbidon AI designs in a test game with high starting tech level and let the simulation run on "Auto". So you don't even need a savegame to verify this for SE IV Gold Version 1.78.