[This comment also by 86.177.136.35, 24 June 2012] 

 :::Aha. The extra factor in Krane's numerator is the λi which the formula now in the article (which cites Cetnar's paper) places before the one product symbol. So the two formulas are equivalent, and the only question is which is the clearer presentation for this article. I vote for the one now in the article since it shows the λi explicitly. (And to sign your posts, click on the four ~ below, 4 lines under the Save page button on the right.)