IE7-/Win: hasLayout, stacking, floats

H hasLayout, neg m-b

H no hasLayout box

H hasLayout box

relative box

H hasLayout, neg m-b

H hasLayout box

H no hasLayout box

relative box

H float, neg m-b

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H no hasLayout box

H hasLayout box

relative box

In IE7-/Win the stacking of overlapping boxes (here caused by some negative vertical margin) is wrongly affected by hasLayout, and in some cases changes when some hover effect is applied.

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