The first line (and only the first line) of the following paragraph below should be uppercase. This should still be true even after resizing the window width.

This is a somewhat long HTML paragraph that will be broken into several lines. The first line will be identified by a fictional tag sequence. The other lines will be treated as ordinary lines in the paragraph.

The paragraph example above directly comes from CSS 2.1, section 5.12.1 The :first-line pseudo-element
Internet Explorer 8, Firefox 3.6, Opera 10.10 and Seamonkey 2.x pass this test.
This bug has been reported at KDE Bug Tracking System as bug 225572
Valid HTML 4.01! CSS compliant