I remember that issue, but from what I recall, it was actually Antec's (or someone elses) fault, since they went ahead and made a certain PSU spec higher than it should have been, and for whatever reason, other PSU manufacturers followed suit.
It was then that the motherboard manufacturers had to alter their boards in order to handle the new spec.
I think it had to do with the +5VSB, which Antec (or again, whoever) upped to 3.5A, when it should have been 3.0A. I could have my facts mixed-up, but I'm quite sure it had something to do with the +5VSB.
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<Toad772> I don't always drink alcohol, but when I do, I take it too far.