IPA, I'm not sure the 2d shockwave ever worked in 3.6.9. You'd have never been able to test it as long as the shockwave.pof file existed. If it was tested before that and it did work then there may be something wrong, but Fubar said it only breaks when used with the custom skybox.pof. So it could be an issue in either of those things, or a code issue. It's not worth sweating too much about since TBP isn't getting any more fixes anyway, so forcing 3d shockwaves with the TBP flag is the best option at this point, which I have done now, and the black boxes around shockwaves should be gone. Report any other issues on Mantis and they'll get fixed.