I recently purchased Dark Avatar from Stardock.
The installation went fine and I can get the game up and running.
I have my computer set up with different users for my family, for the purpose of controlling my child's (age under 10)internet access.
My child and I play Galciv together, taking turns, when I work she controls our civ. When I am home, we play it together. We do this playing the same game through different user accounts on the computer. Galciv2 always worked well for this after copying the files from my documents/mygames/galciv2 to the other user account's mydocuments/mygames/galciv2.
I did this with Dark Avatar too, but when switching to my childs user account Dark Avatar does not load and projects a permissions error.
Operating System is Windows XP Media Edition.
Probably not a common problem.
TJ_Striker