When you try to talk with the gardener (which is the agent) the program waits for sxomething and you cannot continue. This is an engine bug and will be dealt with later (when, would you reckon Arisme?).
Meanwhile, if any of you could find a save game sometimes after this talk is supposed to take place, it would be useful to post it here (or anywhere) so that we can continue with the game.
thanks,
meste