Opera Problems/Bug with font-size: 100%

Opera (tested 6.04, 6.0, 5.12 on Windows 98 SE and Windows XP) measures a wrong font-size if the CSS property font-size is declared to be 100% and then cascaded. All example text should be equal in height, as 100% from 100% again is 100%. 100% is declared for every SPAN element used in examples.

Examples:

EXAMPLE HEADLINE LEVEL 2

EXAMPLE PARAGRAPH.

EXAMPLE HEADLINE LEVEL 3

Screenshot for examples in Opera 6.04, Windows XP.