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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.

I don't have time to check, but this may be the cause. I can't think why I would have turned shadows on for an IBL. And frankly, since you can't use Depth Map shadows with point lights (the option is greyed out), it seems to me that you should not be able to "use" shadows at  all with IBLs since a global light casting a shadow is a paradox.

M