Searched the forum and haven't seen the exact same issue come up (though I've seen a few on maptext in the web client.)
I'm sure this is a simple fix for someone who is more clued up about the web client than I am; I'm not the greatest programmer so it's almost certainly something I've overlooked (or maybe it doesn't like the format of the font I made?)
Here's a screenshot to show what I'm referring to:
EDIT: Not sure if I've posted this in the right section. If needed, let me know and I can repost it.
However, supporting such fonts (at least as long as the browser recognizes it as usable) via a @font-face declaration is high on my to-do list. There's really no reason it can't be added to the webclient and it should be fairly low-hanging fruit.