I think it’s similar to this incident:
http://archives.neohapsis.com/archives/postfix/2002-05/1044.html

It’s caused by the fact the we’re using the “rename” function to move the new vps file from the temp directory but this does not work if the filesystems in /tmp and /var/lib/avast4 are different.

I guess we’ll change it to copy instead…

Thanks for the input,
Vlk