diff --git a/media/js/jquery.dataTables.js b/media/js/jquery.dataTables.js
index ce683e06..365d535f 100644
--- a/media/js/jquery.dataTables.js
+++ b/media/js/jquery.dataTables.js
@@ -3306,6 +3306,8 @@
 			nScrollHeadTable.style.width = _fnStringToCss( iOuterWidth );
 			nScrollHeadInner.style.width = _fnStringToCss( iOuterWidth );
 		
+			// Figure out if there are scrollbar present - if so then we need a the header and footer to
+			// provide a bit more space to allow "overflow" scrolling (i.e. past the scrollbar)
 			var bScrolling = $(o.nTable).height() > nScrollBody.clientHeight || $(nScrollBody).css('overflow-y') == "scroll";
 			nScrollHeadInner.style.paddingRight = bScrolling ? o.oScroll.iBarWidth+"px" : "0px";
 			
@@ -9744,9 +9746,10 @@
 		 *     <li>string - read an object property from the data source. Note that you can
 		 *       use Javascript dotted notation to read deep properties/arrays from the
 		 *       data source.</li>
-		 *     <li>null -  the sDafaultContent option will use used for the cell (empty
-		 *       string by default. This can be useful on generated columns such as
-		 *       edit / delete action columns.</li>
+		 *     <li>null - the sDefaultContent option will be used for the cell (null
+		 *       by default, so you will need to specify the default content you want -
+		 *       typically an empty string). This can be useful on generated columns such 
+		 *       as edit / delete action columns.</li>
 		 *     <li>function - the function given will be executed whenever DataTables 
 		 *       needs to set or get the data for a cell in the column. The function 
 		 *       takes three parameters:
diff --git a/media/src/model/model.defaults.columns.js b/media/src/model/model.defaults.columns.js
index adb2acde..ef1c3cdd 100644
--- a/media/src/model/model.defaults.columns.js
+++ b/media/src/model/model.defaults.columns.js
@@ -345,9 +345,10 @@ DataTable.defaults.columns = {
 	 *     <li>string - read an object property from the data source. Note that you can
 	 *       use Javascript dotted notation to read deep properties/arrays from the
 	 *       data source.</li>
-	 *     <li>null -  the sDafaultContent option will use used for the cell (empty
-	 *       string by default. This can be useful on generated columns such as
-	 *       edit / delete action columns.</li>
+	 *     <li>null - the sDefaultContent option will be used for the cell (null
+	 *       by default, so you will need to specify the default content you want -
+	 *       typically an empty string). This can be useful on generated columns such 
+	 *       as edit / delete action columns.</li>
 	 *     <li>function - the function given will be executed whenever DataTables 
 	 *       needs to set or get the data for a cell in the column. The function 
 	 *       takes three parameters: