Quote - 40. I hope I'm just having a brain cramp on this one. IBLs are directional. I dunno if they didn't used to be, or the just were SUPPOSED to be non-directional, but in P7 the position of the light source changes the way the "global" lighting is applied. After discovering this about IBLs I created myself, I went back to t he prepackaged ones, and this does not seem to be true of them, only the ones we create.

I was working with a Key spot, a Fill spot, and an Infinite, plus an IBL. With everything off except the IBL, and the IBL at -90x, 0,0, the model was illuminated from above. With the IBL at 0,0,0, she's illuminated from the front. It's possible that the problem is, it's not really turning off the Infinite light, but I'm running the Render now with all lights deleted except the IBL....  With them deleted, it doesn't happen.

The IBL lights act like an Infinite light in preview.
If you turn on shadows for them, then the rotation settings determine the direction, just like an Infinite light.
This behaviour is the same as it was in P6.