Sprite fonts not working in Firefox?

The subject pretty much sums my thread up. I've tried the game on Chrome and IE n' the sprite fonts show up okay, just not Firefox. Is this a well known problem with FF, or have I messed something up somewhere? My sprite fonts are 7x7px if that helps narrow down the problem.

You should post a capx.

Sprite fonts being images/textures, there isn't a difference in display between Chrome and FF normally.

If you are talking about web fonts, there is indeed actually a difference in the display, it is just a question of render engine, nothing to be done other than find a font that looks pretty much the same in both browsers.

Sprite fonts are working ok for me.