The attached test case explains everything in detail. An example of a problem is this: <span style="text-decoration:underline"> Hello <span style="font-weight: bold;"> Lovely </span> World </span> In the above, NGLayout renders the underlining jagged. It is my assertion that it should be the same throughout, as it is the underlining of the outer span that is being applied to the inner span, and not the inner span that is underlining itself. That is, the inner span should have *no* effect on the rendering of the underlines. One way of looking at this is through inline boxes. The above generates two inline boxes, one for the outer span and one for the inner span. The inner inline box overlaps the outer inline box (in fact, in this particular case it is contained within it): +-------+========+-------+ | Hello | Lovely | World | +-------+========+-------+ The underlining should (as I understand it) be applied *to the outer inline box* only. That is why, for example, the colour is the same throughout the underlining. Hence, if you made the middle span invisible (using the visibility property), the underlining would remain.

Peter -- this appears to be a legit complaint as shown in the testcase.

Sorry, but no. The style and color of the text decoration are controlled by the style where the decoration was applied. The line wieght and position must be determined by the font where it is drawn. Otherwise decorations can too easily be rendered in nonsensical places.