Shouldn a Lucida Sans font stack use Lucida Sans Unicode?
This is exactly the purpose of the font stack builder, to refine your font selection and stack sequence to get the best results for your typography. It is a matter of judgement whether you top your font stack with Lucida Sans Unicode or Lucida Sans, there may be subtle differences in their character forms and relative size, certainly the Unicode version has better coverage on Windows. As you have noticed, putting more common fonts towards the top of the font stack reduces the likelihood that fonts further down the stack will be displayed for most people. Only the few that do not have the top font will see a fallback font. Actions: Follow-up, clarify or correct this answer. Submit a new question.
This is exactly the purpose of the font stack builder, to refine your font selection and stack sequence to get the best results for your typography. It is a matter of judgement whether you top your font stack with Lucida Sans Unicode or Lucida Sans, there may be subtle differences in their character forms and relative size, certainly the Unicode version has better coverage on Windows. As you have noticed, putting more common fonts towards the top of the font stack reduces the likelihood that fonts further down the stack will be displayed for most people. Only the few that do not have the top font will see a fallback font. Actions: Follow-up or correct this answer. Submit a new question.