Details
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    Type:Bug 
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    Status: Done/Fixed
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    Priority:Minor 
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    Resolution: Fixed/Completed
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    Affects Version/s: 2.0
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    Fix Version/s: 2.0
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    Component/s: Core CiviCRM
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    Labels:None
Description
CiviCRM expects the custom group tables in the lower case format, which 1.9 -> 2.0 Upgrade process doesn't ensure.
For details refer - http://forum.civicrm.org/index.php/topic,3142.0.html