Okay, got some new information about sockets.
It is said to have something to do with immense artificial lag, clicking on improve and re-opening artisan with the items still in. Put them back in Artisan and improve again.
It's necessary to have intense Lag while doing this.
The logic behind this is to fire as much uprgade requests as possible, thus succeeding more often then just once, yet still the items stays on the same quality and level due to lag.
_
This is just a rumor i caught, anyone know how to cause the highest possible lag without dc/ing?
/edit:
Another thing i've been wondering about. Whats happening if you got a full inventory and upgrade stuff, the second you put the thing in, its not in the inventory, but a few seconds after. What if you pick up something in the same second you put it in... only do-able with heavy lag. Whats happening then?