Well I had a go at getting some screens of the flashy black texture problem, and it's actually quite difficult - the screens don't catch the flashing very well. Here's the best ones I could get:
http://cloud.steampowered.com/ugc/55...6F42C35C54F48/
http://cloud.steampowered.com/ugc/55...31AE9B7F0177A/
You can kinda see it on the striped bow of the ship... you can see what look like shadow triangles.. but it's not very clear. The bow, the launcher things in the middle of the ship, the porthole on the side of the DD all flash black at quite high speed... you can kinda see a tiny black tear on the porthole too.
I'm not sure if it's the shadows causing it or the textures. Sometimes the effect is very visible on terrain if you use the free camera and move it quite far away from the sub, ships too. I might have a look and see if I can get a terrain grab of it when I come into port later.