Actually, the more I think about it, the more I'm convinced that the actual issue here is that there is a bug somewhere that is making "pt" fonts get dpi-adjusted _twice_, and "px" fonts are being dpi-adjusted once.
Actually, the more I think about it, the more I'm convinced that the actual issue here is that there is a bug somewhere that is making "pt" fonts get dpi-adjusted _twice_, and "px" fonts are being dpi-adjusted once.