I don't think that questions about ones mental health is appropriate for a job interview. Because the only job I have held in a long time is with a family business I have never faced this dilemma. Here is a link though about what things employers should not ask:
http://blogs.findlaw.com/law_and_lif...interview.html
Sorry about the opportunity falling through for you, I hope you find something even better soon.
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Friendship is born at that moment when one person says to another: "What! You, too? Thought I was the only one." C.S. Lewis
visit my blog at
http://gimmeice.psychcentral.net