just to be somewhat clear, the debate in that thread isn't about whether or not you should use JIS or ISO tapers -- it was as to whether or not the Sugino and Shimano tapers, both of which are JIS, are different. JIS cranks should certainly not be used with ISO taper bottom brackets and vice versa. the differences in the tapers are significant enough that, while one may work a bit, you are at risk of rounding out your crank taper holes and/or slippage.