[2013-12-17 19:23:55.640] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:23:56.653] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:24:57.488] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:25:01.508] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:25:02.519] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:25:12.692] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:25:26.478] Generated an incorrect block. Waiting for the next one
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[2013-12-17 19:25:58.736] Generated an incorrect block. Waiting for the next one
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When I run 0.3.20client,it displayed as above,what should I do or no need?