Just wanted to report a bug I've found with nested font tags. I have a screenshot of the effect below with the text that leads to it. If you open one font tag inside another then close the inner font tag, the display font returns to default rather than respecting the font of the enclosing tag.
Let me know if any additional details would be helpful! ^^
<f=Retron2000Regular>Gombön is here to <e=bleepOpen><f=Helpers>fuck</f><e=bleepClose><e=excl=open> you up, baby!<e=excl=close></f>