Fixed in
http://www.squeaksource.com/PharoInbox/SLICE-underlineInLazyListsWithFreeTypeFonts-andrew_tween.2.mcz

LogicalFonts do not have underlined, or strikethrough, variants. Instead it is left
to whatever is asking the font to render text to also ask the font to display the
underline. 

For TextMorphs this was already working properly, with DisplayScanner rendering
underlines and strikethrough. But, LazyListMorphs don't use DisplayScanner. They call
Canvas drawString... instead. 

I have created new drawString methods that allow the underline/strikethrough to be
specified with boolean parameters. These drawString methods then ask the font to
render the underline/strikethrough after rendering the string. In addition, the
colour of the line can be specified which will allow it to be different from the
colour of the text - e.g. text in black underlined in red.
--

This is the first time I've made a SLICE, so apologies if I have made any mistakes.

I'll sign and mail the license agreement a.s.a.p.