[Pan-users] How to tell Pan to *stop* constantly asking to install fonts?

[Rock]

Quite a few times a day, even when seemingly doing nothing, 
Pan 0.135 pops up a form asking me to install fonts:
 http://i39.tinypic.com/2i7qm2p.png

This latest message says:
 Pan newsreader wants to install fonts
 Thai
 Cherokee

While Thai and Cherokee are the current request, it seems 
that various fonts want to install (often Asian), but none 
of which do I *ever* wish to install! 

Is there a way to tell Pan to *never* install fonts and 
especially to *stop* asking to install fonts?

Incidentally, *why* is Pan constantly asking me to install 
fonts in the first place?

(If it matters, Firefox does it also.)