Border of focused HTML button element with keyboard should look different in Konqueror 4

Steps to reproduce: tab (and shift+tab or navigate with keyboard) into the following HTML buttons

Example taken from the excellent testcase: Robin Lionheart HTML 4 Conformance test: Forms

Expected results: There should be a light blue (blurred) outline border around each button as they get focused. A focused HTML button element should be visually easy to distinguish from a non-focused HTML button element.

Actual results in Konqueror 4.3: there is no visual distinction whatsoever between a focused HTML button element and an non-focused HTML button element.

Compare testing with the following input form controls:

This bug has been reported at KDE Bug Tracking System as bug 196817.

Valid HTML 4.01!