Klingon Academy Problems

[Killallewoks]

Now i'm posting here as pretty much the KA forum is dead but I was just wondering if anyone else is havong the same problem as I am. What it is everytime a enemy ship cloaks and I am looking at it my comp lags like hell then when he moves off screen I get 40+ FPS.

specs:
Win7 *64
AMD Vision 4GB 1.9GHZ CPU (Dual Core)
AMD Radeon HD 6310M Graphics card *2

This is running with Komats patch's.