I just received my refund yesterday, finally! Half a year after I made the application! ... I tell you what I did: after 30 days I mentioned in last answer, I went on IRS office again. They spent half an hour checking my case and told me they had nothing to do with my refund because they had already passed my case but the 'fanatical department' was still investigating my account so I would not see the money until it is done. I followed the suggestion of irs officer to raise a '911' tax case, which is handled by a 3rd party organization for taxpayers. You could find the instructions of this '911' from irs and the service is free. Then I just submitted a form to them and they accepted my case. I provided some documents, it took about another 2 months to finally receive the refund .
