Failed to create receiver object from assembly sharepoint 2010 error while deploying WSP

The problem was because the timer service cached the previous dlls. You have to restart timer service on all servers in the farm before starting any new deployment.

Sharepoint 2010
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 net stop SPTimerV4

  net start SPTimerV4


Sharepoint 2007
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 net stop SPTimerV3
  
 net start SPTimerV3

Managed Metadata Column Limitations

http://www.sharepointanalysthq.com/2011/06/managed-metadata-column-limitations/

how to see search result xml in sharepoint 2010

1. create one xsl file and paste below code in file

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/">
<xmp><xsl:copy-of select="*"/></xmp>
</xsl:template>
</xsl:stylesheet>

2. give path in 

Miscellaneous>XSL link