hello,
I live in France and I experience the same thing. I just stop sleeping when I take fish oil or polyunsaturated oil like (canola, flax walnut oil, borage oil, rape oil...
I think may be those person who react like that need more vitamine E to protect these kind of polyunsaturated oil from oxydation in their body. So I m now going to try Wheat Germ oil to see if it has the same negative consequences because this oil is very rich in vit E.