Has anyone here gotten this achievement to work in their game? I've maxed out Tredonian influence, then BAKCSTABBED, and now have pirate influence... but no achievement? Is it because it has to has a different quest than Betrayal for the allegiance to register? Or is it just a bug specific to my copy...

I know I can use Grim's mod to enable all achievements, but I was having fun trying to earn them up until now.