Gauss Railgun Infinite Range
I'll attach a save later if no one can easily replicate, but I'm watching my Kol rotate to use this ability on pirates in one of my systems. I can hover over the ability and see the purple circle and the defined 5000 range limit, however as soon as he acquires the right angle he fires and hits the enemy ship from easily half the grav well away.
Edit: Hmm, after alt-tabbing behavior has returned to normal. I'll watch the replay later and attach if it demonstrates it. Don't know how I could have been seeing things though...