In IE6 100% is 1 px less than correct when the reference value is odd (e.g. 100% of 101px is wrongly computed as 100px). Seems to occurs on positioning properties (e.g. left), not on others (e.g. margin). Above the left property is tested: in the 1st and 3rd set of tests it is expressed as 100% and shows the error, in the 2nd and 4th is is expressed in px and is correct. Below the margin-left property is tested, no errors.

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