Recently I attacked some sector fighters deployed by an opposing corp. I gained experience but my alignment was unchanged. The corp alignment was way negative and I was using 1000's of fighters. Is this a bug or do corp fighter not affect alignment? The game was version 3.13.

It is a setting in tedit as to whether or not corp figs will cause alignment swings. If the game is in MBBS mode, they will never cause alignment swings. If it is non-MBBS mode, they default to causing swings but it is sysop editable, so you can't be sure until you try.

Ok that explains it - It's a MBBS mode game.

Thanks