Thought I'd post as a question before I called this a bug. I have a save available in case you guys think this is not quite normal behavior.
I had a group of beam frigates attacking through a shield at some sniper turrets that were protected by said shield. Beam frigs have the 'fires through shields' attribute after all. however, mousing over the sniper turrets, I noticed they weren't taking any damage whatsoever! Sniper turrets are immune to sniper shots, and I thought being instant travel, the beam frigates might fall under that category, however they're marked as beam shots, so I am unsure.
Opinions? If the snipe turrets should be immune shouldn't the beam fridges not shoot at all, thus not wasting fire against targets they can't hurt?
Feel free to move this post to bug reports if you think it merits it, and I can attach a save (though it should be simple to reproduce via spawned ships).