I’m not sure where to post this, but the Unity Store doesn’t work for me in IE using Vista.
I’ve got firefox installed, and it loads just fine.
strange~~
I’m sure that Windows users being able to buy Unity is UT’s TOP concern at the moment. 
true - but better not to assume the user is always making the purchase - some of us have finance depts
Can you send details and the exact text of the error message(s) to bugs@unity3d.com?
d.