I noticed today at M14 which was in an ion storm, that each time I left the sector I had suffered damage from the turrets.

I have long noted that turrets will fire at ships leaving system, occasionally on normal space, but always during storms

Yes, this bug has been posted about before, but seems to be of little concern to the devs as it has not yet resulted in the loss of a players ship or goods.

M14 of which system?

Bractus. The conq station.

Correct. Bractus M14. Normally the turrets fire, but do no damage. However each time I left the sector this morning, my ship had taken damage.

The turrets have always fired on all players warping out but usually they caused no damage. I think it was decided that the ship became an unknown player at the start of the sequence and the turrets shoot at them until they are removed several seconds later at the end of the sequence.

During storms the exit is a lot closer then normal so the shots actually arrive but the damage was 0 since it was caused by an npc and not a player....

Yeah, that pretty is pretty much correct, the storm exit-point is closer to turrets, so the shots would actually arrive in time, damaging or killing the player.

I found the problem and fixed it for the next update.

Fixed the storm exit point or fixed the turrets seeing keyholders as targets when they jump?

This could also be easily fixed by the player with an active valid key and the conq station defenses appearing as 'friendly/green' to each other unless fired upon by each other just as in friendly station sectors. Duh.

I don't think it's really that simple. :)

Fixed the turrets attacking key holders while they are jumping.