Here are snap shots of the properties on both projects for spritefont.
The game it works with.
<img src="http://www.edfarias.com/games/sprFont1.png" border="0" />
The game it doesn't.
<img src="http://www.edfarias.com/games/sprFont2.png" border="0" />
The game it doesn't work with using a bigger sprFont img it has the full alphabet in caps, then numbers. The first one that works only users the full alphabet in caps. I'm not sure if that matter.