It is solved simply - because of that 400.vps is getting bigger each time, and we have new version of avast! 1.3.0.5 along with
new Kernel 3.14 (soon 3.15) - which makes necessary to pimp up the size too - also :
sudo sysctl -w kernel.shmmax=128000000
or
sudo /sbin/sysctl -w kernel.shmmax=128000000
is out-dated !
Instead we need to type in terminal :
sudo sysctl -w kernel.shmmax=256000000
or
sudo /sbin/sysctl -w kernel.shmmax=256000000
In case there still pops up an error report like "invalid argument" or similiar ... then you download the file 400.vps
manually with :
wget -c
http://files.avast.com/files/latest/400.vpsDelete the old 400.vps - file which is already given in /home/$user/.avast
and place the downloaded 400.vps there.
Now it should work really really really !
:-)