Just delete this line in FCConfig.m :
SetOptions[Integrate, GenerateConditions -> False]
------------
Of course, the fact that
Integrate[y^2, {y, 0, Infinity}, GenerateConditions -> False]
gives 0 in both Mathematica 7 and Mathematica 8 seems a bug to me.
I reported this to support@wolfram.com
Rolf
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