--- jquery.tablesorter.pager.js	2008-03-17 23:48:50.000000000 -0700
+++ jquery.tablesorter.pager.js	2009-11-25 15:51:16.000000000 -0800
@@ -145,12 +145,16 @@
 					
 					config = $.extend(this.config, $.tablesorterPager.defaults, settings);
 					
-					var table = this, pager = config.container;
+					var table = this, pager = config.container, tmp;
 				
 					$(this).trigger("appendCache");
-					
-					config.size = parseInt($(".pagesize",pager).val());
-					
+
+					tmp = parseInt($(".pagesize",pager).val(), 10);
+					if (!isNaN(tmp))
+					{
+					    config.size = tmp;
+					}
+
 					$(config.cssFirst,pager).click(function() {
 						moveToFirstPage(table);
 						return false;