I just downloaded TTD (incl. XP-Patch) from abandonia.com (don't know if I'm allowed to post the link?).
Every time I try to save, it says saved, but when I want to play again, my savegame is not in the load game list.
OK, I've read that I can only save a limited number of games and I should save in a subdirectory instead, but when I go to C: I can't choose any directory any more and when I just save at C: the game says "Game save failed". Also the autosave fails.
I've built a quite good company and now I can't save

I hope you could help me to prevent this failure the next time.
so long