Some people already have been met the "Muted" problem, when All system sounds stopped to work and nothing help.

Some links with similar problem:
http://talk.maemo.org/showthread.php?t=92899
https://together.jolla.com/question/6712/muted-mykistetty/

I found solution (for me at least) and created this simple package that can fix this problem.
Just press on the icon and wait for notification about fix

v0.1-2
* Adaptation for 1.1.1.27.

Beware, use it on your own risk !!!

Donation are welcome :)