Thunderbird - incoming mail signal duration
Intro (trying to be as succinct as possible):
I'm trying to set up my Thunderbird 3.1.8 (running on Ubuntu 10.04 LTS) to play a .wav file of my choice when new mail arrives. The file I've chosen is 8,8 KB in size and lasts 3 seconds. I've selected the "Play a sound" + "Use the following sound file" options in my Preferences, but only the first second (if that) of the sound gets played - both when I click the "Play" button in the Preferences menu to test it, as well as when receiving mail. Restarting the program with my new settings doesn't help.
- Is there a limit on the size/duration of the sound one can use for such a signal in this program?
- Is there any way to modify this limit?
Thanks in advance for any help anyone can provide.