Hmmm, that's a puzzle - I just checked and they all seem to download OK. You will know you are on the right page when you see a description of the changes each patch makes and a choice of Euro, US or Asian/Japanese patches. It should not make any difference to downloading them, but they are zipped.
An alternative download location is here
http://www.godgames.com/games/darkstone/
Best of luck
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Regards
Mouse
[This message has been edited by Mouse (edited 05-19-2001).]