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No one believes they have an ugly baby. And all entrepreneurs are convinced that their businesses are better than the other guy’s. So chances are you’re sure (or at least really hopeful) investors will be lining up, eager to put money into your business.

 Angels, VCs and banks take a more clear-eyed approach. If they see any of these five warning signs, they’re likely to put away their wallets and head for the hills.

With the angst from the angels and venture capitalists debate still hanging in the air, and the thickening plot of "Angelgate," it's easy to forget that courteous, polite and gracious behavior can save your startup from easy pitfalls. In an industry that functions largely on connections, burning bridges is never a smart move, intentional or not. Here are a pair of examples from seasoned venture capitalists on how playing nice can go a long way.