Audible alerts not working with seamonkey-2.35a1

Hi All

Having completed a couple of downloads without the download completed 
noise I opened Edit, Preferences, Downloads to see if I had lost a setting.

No, the setting Play a sound is checked. I clicked the Play button: No 
noise.

I also checked the new mail notification having just realised that I had 
not heard that either. That is checked but clicking Play produces No noise.


Even worse: After closing Seamonkey I thought I'd have a quick game of 
Klondike. I thought wrong as Klondike would not start.

My guess is that attempting to Play the Seamonkey alerts has "jammed up" 
mmos2 as I seem to have lost all system sounds and mplayer/smplayer 
seems to get stuck attempting playback of any video file selected.

A reboot resolved the problem.

A retest of the Seamonkey audible alerts caused the same problems 
requiring another reboot.


The question is: Is this just my system or is it a common problem with a 
bug report already filed?


Regards

Pete