Cufon Problem - Joomla + Firefox

Hi there,

I have a site running on Joomla and I'm using cufon for changing the font type.

The problem is that, in firefox, the tile only shows in the correct font in some articles...

Here, using firefox the title shows up fine:
http://sostudent.com/joomla/index.php/solutions

Here, using firefox the title shows up without the font replaced by cufon:
http://sostudent.com/joomla/index.php/about-us

Also, I can't seem to change the links font as you can see in the "Contact Form" link on this page:
http://sostudent.com/joomla/index.php/contacts

In Google chrome everything seems fine!!

Can anyone please help?

Thanks,