Hi MattGood,

Just an update, it appears that this issue has been covered before within this forum :

http://forum.avast.com/index.php?topic=57764.0

In order to accomodate future increase in the 400.vps database internal block size

(re : http://forum.avast.com/index.php?topic=57764.msg486989#msg486989 ),

I have now revised the shared memory block size maximum limit of my Ubuntu/Linux Mint machines to:

shmmax = 268435456 (256Mbytes x 1024 x 1024)

which is about 1/16 of my 4GM RAM machine and 1/8 of my other 2GB RAM machine.

So far so good.

Best regards