Vertical-align: sub is incorrectly rendered in Opera 10.0

Actual (live) result in your browser:

vertical-align: sub

Expected result (screen shot 300px wide, 68px tall):

    subscript the element"
CSS 1, section 5.4.4, vertical-align property

    Lower the baseline of the box to the proper position for subscripts of the parent's box"
CSS 2.1, section 10.8.1, vertical-align property

Internet Explorer 8, NS 6.1, NS 6.2, NS 7.0, NS 7.1, NS 7.2, Firefox 1.5.x, Firefox, Firefox 3, Safari 2.0.4, Safari 3.0.4, Konqueror 3.5.5, Konqueror 4.1, Seamonkey 1.x, Seamonkey 2.x, K-meleon 1.x, Epiphany 2.14 all pass this test.

This bug has been reported at Opera BTS as bug DSK-250846.

HTML 4.01 Strict compliant Valid CSS!