Fonts and I just don't seem to want to get along I've had an issue with fonts not working a while back but running that update submodules command didn't fix my problem this time.

Now whenever I try to set graphics.font = to something it errors on this line in Boot.hx:
else throw "Cannot cast " +Std.string(o) + " to " +Std.string(t);

And the debugger says o (my font) is null and t is function (blob) {}. Anybody run in to this or know how to fix it?

I've even tried cloning these projects that worked for me in the past, but now I get the same error as above.
https://github.com/jamiltron/KhaShmup/tree/part-8
https://github.com/lewislepton/kha-examples/tree/master/FONTnTEXT

I get this problem on Windows 7 and 8 compiling html5. I'm at a loss here, any help would be greatly appreciated. Thanks!

You have to load the fonts before you can use them. You can use Assets.loadEverything to just load everything but make sure not to use anything before the callback is triggered. FONTnTEXT makes that same error, Project.render can easily run before loadAll is called. Don't see the error in KhaShmup, will have to take a closer look.
The thing is, writing code like that can randomly work and generally works when you use targets which load assets synchronously (which native targets currently do).

For your convenience, here is the fix for FONTnTEXT: https://github.com/lewislepton/kha-examples/pull/3

Ah excellent, that worked! That makes sense, thanks for your help. Also I wouldn't worry about KhaShmup, I'm afraid I didn't actually clone that one, just copy pasted the bits I thought I needed FONTnTEXT I did a proper clone of though.

Okidoki!