Is there a maximum font size for icon fonts?

Hi,

Lost a wee bit of my afternoon debugging a non-displaying font...

Simple question: is there a maximum size of character for imported fonts?

It looks like nothing larger than fontsize 32 exported from BMFont will display.

I would, obviously, like something bigger!

Am I doing something wrong, or have I hit an either undocumented or opaquely documented feature?

Thanks,

G