I solved the problem with gone shutdown button (MATE desktop)

In the September 2015 I have found a problem in MATE desktop environment.
The problem was: shutdown button gone from the MATE's main menu.

exec ck-launch-session mate-session

To fix this quickly I created the shuter project.

Today I suddenly found a solution. I fixed the problem by replacing the next line

exec ck-launch-session mate-session

with the another one:

exec mate-session

in the ~/.xinitrc file.

exec mate-session

 Start sessions of MATE properly!

Update from December, 18

I've just updated software packages on my FreeBSD 10.1.
Read this post if you wish to know what's new.
(I'll update this post during solving problems.)

Font

Yes. Default font in MATE was updated. It became thinner.

GIMP

Goodbye gimp. It was updated to 2.8.16.
Opening and saving JPEGs was broken (file-jpeg plugin clash).
Darla plugin was broken (script-fu plugin clash).
The plugin-browser and procedure-browser plugins are broken too.
Something else... may be.

The solution for all the problems is

# cd /usr/ports/graphics/gimp-app ; make config reinstall clean

I ticked the options with JPEG word in the description. In other words I ticked all the options of the gimp-app configuration :)

For the possible future

I'm considering to replace alsa with pulse. I wonder if this will repair volume control slider (for now: it just does not work: the volume level does not change when I'm moving the slider)