[Dillo-dev] Which FLTK2 version for dillo-2.1.1?

I want to update the BLFS pages for Dillo-2.2.1 so I need to know which version(s) of FLTK2 to recommend. I remember there was a recent discussion but I can't find it in the list archives (strangely, searches for "fltk2" and "fltk version" turn up next to nothing - is search working?). Regards, Jeremy Henty