iPhone storekit sandbox stopped working

Question

Bug reported as fixed by Apple, see accepted answer below ...

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UPDATE MON AUG 23rd 10:00 GMT

Although the bug report with apple hasn\'t been closed yet,

Answer 1

I've been going nuts over the same issue all morning in Lion and MacOS (not iPhone). The sandbox is not working.

I just got "An unknown error has occurred" when trying to make the purchase and a console error like this one

8/23/11 1:12:26.090 PM storeagent: promptResponse: 

If there is another poor soul like me out there that has been burning their brains out for hours to make this work I just found the answer: the in-app purchase sandbox is ONLY working for US test users. Other stores are not working (my test user was set to Argentina...). Create a new Test user, set it to the US store, and it will work...

I hope this helps.