Moz New Mail sound doesn't play

[Kent West <westk@acu.edu>]

I've never been able to get Mozilla Mail to play a sound when new mail 
arrives. This has been true on any of the Debian boxes I've used (Potato 
up through Sid; different hardware, etc).

I can't even get the "Preview" to work when you browse for a .WAV file 
to play when you're in Mozilla preferences. Any clues?

Thanks!

--
Kent