IPhone :: Signal Bars Drop Even With Case

I received my iPhone 4 on launch day via a pre-order. I am very grateful to have it and to have received it while others still try to get one. Anyway, onto the issue. I had signal drop issues from the get go, occasionally even a few dropped calls. Per Apple's statement and other blog recommendations I bought a case to alleviate the issue. It's the Griffin Reveal. It is a nice case too. Last night I noticed low signal bars after a dropped call and realized I was holding it over the left corner. I let go and up went the bars.

I called care. They opened a case # and gave me the same as anyone else. I was told that I needed a bumper to fix the issue, that they couldn't guarentee with any third party case it would fix the issue. I responded asking why I should give another $30 to fix an issue they know about. I asked if I would recieve and email or call to follow up and they said they didn't know. I will follow up in 2 days and let you know. Is this a ploy to just get people to spend more money? 1.7 million sold in three days x $30 for a bumper = $51 million more for.