Hello,
   I have recently upgraded from dspace 1.7.0 to dspace 1.8.2, The upgrade
was good or the most part. However, when I browse by title, author, subject
etc..  I get an error:

org.postgresql.util.PSQLException: ERROR: current transaction is aborted,
commands ignored until end of transaction block

Java stacktrace:

org.postgresql.util.PSQLException: ERROR: current transaction is
aborted, commands ignored until end of transaction block
        at 
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1531)
        at 
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1313)
        at 
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)
        at 
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:452)
        at 
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:354)
        at 
org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:258)
        at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
        at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
        at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
        at 
org.dspace.storage.rdbms.DatabaseManager.query(DatabaseManager.java:284)
        at 
org.dspace.browse.BrowseDAOPostgres.doCountQuery(BrowseDAOPostgres.java:153)
        at org.dspace.browse.BrowseEngine.getTotalResults(BrowseEngine.java:752)
        at org.dspace.browse.BrowseEngine.browseByValue(BrowseEngine.java:441)
        at org.dspace.browse.BrowseEngine.browse(BrowseEngine.java:94)
        at 
org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse.getBrowseInfo(ConfigurableBrowse.java:805)
        at 
org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse.addBody(ConfigurableBrowse.java:260)
        at 
org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:223)
        at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71)
        at $Proxy20.startElement(Unknown Source)
        at 
org.apache.cocoon.components.sax.XMLTeePipe.startElement(XMLTeePipe.java:87)
        at 
org.apache.cocoon.xml.AbstractXMLPipe.startElement(AbstractXMLPipe.java:94)
        at 
org.dspace.app.xmlui.wing.AbstractWingTransformer.startElement(AbstractWingTransformer.java:240)
        at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
org.apache.cocoon.core.container.spring.avalon.PoolableProxyHandler.invoke(PoolableProxyHandler.java:71

Any help would be greatly appreciated.
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