I Can't use a font I selected in template manager, what now?
Select everything (including the macro pictures) that has to be set in a special font (I used Lucida Handwriting for it in the thread, since that font hadn't been used in the template before), and selected the proper font. I then saved the template, and did use the template to send myself a message and a reply to it. Both messages were in the Lucida Handwriting font...
So selecting the template's text, selecting the font, and finally saving the template solves this problem.
NOTE: Using different fonts will only show the text in that font, if the font is installed on the recipient's system; the fonts themselves are not embedded in the HTML-formatted message!