diff --git a/media/js/jquery.dataTables.js b/media/js/jquery.dataTables.js
index 73095be2..24e3bb3d 100644
--- a/media/js/jquery.dataTables.js
+++ b/media/js/jquery.dataTables.js
@@ -5583,6 +5583,7 @@
 		this.fnIsOpen = function( nTr )
 		{
 			var oSettings = _fnSettingsFromNode( this[DataTable.ext.iApiIndex] );
+			var aoOpenRows = oSettings.aoOpenRows;
 			
 			for ( var i=0 ; i<oSettings.aoOpenRows.length ; i++ )
 			{
@@ -5714,11 +5715,11 @@
 		{
 			var oSettings = _fnSettingsFromNode( this[DataTable.ext.iApiIndex] );
 			var i, iLen;
-			var iColumns = oSettings.aoColumns.length;
+			var aoColumns = oSettings.aoColumns;
 			var nTd, nCell, anTrs, jqChildren, bAppend, iBefore;
 			
 			/* No point in doing anything if we are requesting what is already true */
-			if ( oSettings.aoColumns[iCol].bVisible == bShow )
+			if ( aoColumns[iCol].bVisible == bShow )
 			{
 				return;
 			}
@@ -5729,7 +5730,7 @@
 				var iInsert = 0;
 				for ( i=0 ; i<iCol ; i++ )
 				{
-					if ( oSettings.aoColumns[i].bVisible )
+					if ( aoColumns[i].bVisible )
 					{
 						iInsert++;
 					}
@@ -5741,9 +5742,9 @@
 				/* Which coloumn should we be inserting before? */
 				if ( !bAppend )
 				{
-					for ( i=iCol ; i<iColumns ; i++ )
+					for ( i=iCol ; i<aoColumns.length ; i++ )
 					{
-						if ( oSettings.aoColumns[i].bVisible )
+						if ( aoColumns[i].bVisible )
 						{
 							iBefore = i;
 							break;
@@ -5785,7 +5786,7 @@
 			}
 		
 			/* Clear to set the visible flag */
-			oSettings.aoColumns[iCol].bVisible = bShow;
+			aoColumns[iCol].bVisible = bShow;
 		
 			/* Redraw the header and footer based on the new column visibility */
 			_fnDrawHead( oSettings, oSettings.aoHeader );
diff --git a/media/src/api/api.methods.js b/media/src/api/api.methods.js
index c8959db1..cbc75dff 100644
--- a/media/src/api/api.methods.js
+++ b/media/src/api/api.methods.js
@@ -829,6 +829,7 @@ this.fnGetPosition = function( nNode )
 this.fnIsOpen = function( nTr )
 {
 	var oSettings = _fnSettingsFromNode( this[DataTable.ext.iApiIndex] );
+	var aoOpenRows = oSettings.aoOpenRows;
 	
 	for ( var i=0 ; i<oSettings.aoOpenRows.length ; i++ )
 	{
@@ -960,11 +961,11 @@ this.fnSetColumnVis = function ( iCol, bShow, bRedraw )
 {
 	var oSettings = _fnSettingsFromNode( this[DataTable.ext.iApiIndex] );
 	var i, iLen;
-	var iColumns = oSettings.aoColumns.length;
+	var aoColumns = oSettings.aoColumns;
 	var nTd, nCell, anTrs, jqChildren, bAppend, iBefore;
 	
 	/* No point in doing anything if we are requesting what is already true */
-	if ( oSettings.aoColumns[iCol].bVisible == bShow )
+	if ( aoColumns[iCol].bVisible == bShow )
 	{
 		return;
 	}
@@ -975,7 +976,7 @@ this.fnSetColumnVis = function ( iCol, bShow, bRedraw )
 		var iInsert = 0;
 		for ( i=0 ; i<iCol ; i++ )
 		{
-			if ( oSettings.aoColumns[i].bVisible )
+			if ( aoColumns[i].bVisible )
 			{
 				iInsert++;
 			}
@@ -987,9 +988,9 @@ this.fnSetColumnVis = function ( iCol, bShow, bRedraw )
 		/* Which coloumn should we be inserting before? */
 		if ( !bAppend )
 		{
-			for ( i=iCol ; i<iColumns ; i++ )
+			for ( i=iCol ; i<aoColumns.length ; i++ )
 			{
-				if ( oSettings.aoColumns[i].bVisible )
+				if ( aoColumns[i].bVisible )
 				{
 					iBefore = i;
 					break;
@@ -1031,7 +1032,7 @@ this.fnSetColumnVis = function ( iCol, bShow, bRedraw )
 	}
 
 	/* Clear to set the visible flag */
-	oSettings.aoColumns[iCol].bVisible = bShow;
+	aoColumns[iCol].bVisible = bShow;
 
 	/* Redraw the header and footer based on the new column visibility */
 	_fnDrawHead( oSettings, oSettings.aoHeader );