Hello!
VPS is the virus definition file that are released daily to update avast. It also has other information/settings that can be changed by these vps files.
The latest VPS (20121101) seems to correct the problem of old versions (1466 and older) not update their status to my avast website.
I have 14 devices with avast installed, 2 with 1473 that were working fine, 2 androids that were working fine and 10 with 1466. From these 10 instalations with 1466, 3 received the lastest vps and started to update the my avast website with their informations.
It seems to be everything ok now!
Thanks avast! team!
Elminster