You are right, Developer, looks like my math is screwy. That's what happens when you let an amateur code a plugin! <img src="smileys/smiley5.gif" border="0" align="middle" />
It isn't distorted if you make the spritefont object size twice as large as the individual glyph, in this case at least 32x32. So just make the spritefont object larger than you want it to display.
One of those days I'll really have to sit down and crunch those numbers, since it appears that nobody else is willing to pick this mess up. Oh well!