[raynor]

Unless the Mod Pack 1.0 changed something, here is the behaviour I observed in a couple of my games:

I build frigates with Solar Collector III's and Stealth Armour. I'll turn the cloak on and send them exploring. If they come upon a race I haven't met, I don't make "First Contact" with them until I turn off the cloak.

In one game, I built a cloaked planet destroyer. I moved this ship over an enemy world, uncloaked and destroyed the planet. Despite the huge armada guarding the planet, I didn't engage in battle.

This makes me think cloaking is working at least somewhat against the AI. Unless something in the Mod Pack 1.0 changed a setting to "fix" cloaking.