Index: trunk/admin/install.php
===================================================================
diff -u -N -r5431 -r6093
--- trunk/admin/install.php	(.../install.php)	(revision 5431)
+++ trunk/admin/install.php	(.../install.php)	(revision 6093)
@@ -528,6 +528,11 @@
 		    	$dir_name = $pathtoroot.$mod_path."/admin/install/upgrades/";
 		    	$dir = @dir($dir_name);
 
+		    	if (!$dir) {
+		    		$rs->MoveNext();
+		    		continue;
+		    	}
+
 		    	$upgrades_arr = Array();
 
 		    	$new_version = '';
@@ -555,8 +560,8 @@
 		    			$filename = $pathtoroot.$mod_path."/admin/install/upgrades/$file";
 				       	if(file_exists($filename))
 					   		{
-								include($filename);
-								if($result&2)break;
+									include($filename);
+									if( $result & 2 ) break;
 					   		}
 			      	}
 		    	}
@@ -598,8 +603,8 @@
 	    	$rs->MoveNext();
 	    }
 
-	    $sql = 'DELETE FROM '.$g_TablePrefix.'Cache WHERE VarName IN ("config_files","configs_parsed")';
-		$ado->Execute($sql);
+	    $sql = 'DELETE FROM '.$g_TablePrefix.'Cache WHERE VarName IN ("config_files","configs_parsed","sections_parsed")';
+			$ado->Execute($sql);
 
 		$include_file = $pathtoroot.$admin."/install/upgrade.php";
 	}
@@ -681,6 +686,8 @@
 	   		{
     			$filename = $pathtoroot.$mod_path."/admin/install/upgrades/$file";
 		       	//echo "Running: $filename<br>";
+
+		       	// SQL is processed FIRST (before corresponding PHP according to the sorting order in VersionSort()
 		       	if( file_exists($filename) )
 		       	{
 		       		if($tmp_extension == 'sql')
@@ -709,7 +716,7 @@
 	$objThemes->CreateMissingThemes(false);
 
 	$css_hash = $application->Conn->GetCol('SELECT LOWER(Name) AS Name, StylesheetId FROM '.TABLE_PREFIX.'Stylesheets', 'StylesheetId');
-	
+
 	$css_table = $application->getUnitOption('css','TableName');
 	$css_idfield = $application->getUnitOption('css','IDField');
 
@@ -1428,6 +1435,7 @@
 
 if($state=="lang_install")
 {
+	define('FORCE_CONFIG_CACHE', 1);
 	/* do pack install */
 	$Offset = (int)$_GET["Offset"];
 	$Status = (int)$_GET["Status"];