Index: trunk/admin/install/install_lib.php
===================================================================
diff -u -r2000 -r2561
--- trunk/admin/install/install_lib.php	(.../install_lib.php)	(revision 2000)
+++ trunk/admin/install/install_lib.php	(.../install_lib.php)	(revision 2561)
@@ -15,13 +15,18 @@
 
 function VersionSort($a, $b)
 {
-	preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $a, $rets);
-	$a_version = $rets[1];
-	$a_extension = $rets[2];
+	if( preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $a, $rets) )
+	{
+		$a_version = $rets[1];
+		$a_extension = $rets[2];
+	}
 	
-	preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $b, $rets);
-	$b_version = $rets[1];
-	$b_extension = $rets[2];
+	if( preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $b, $rets) )
+	{
+		$b_version = $rets[1];
+		$b_extension = $rets[2];
+	}
+	if( !isset($a_version) || !isset($b_version) ) return 0; // not php or sql file
 	
 	if($a_version == $b_version) // got PHP and SQL file for one version
 	{
@@ -59,12 +64,14 @@
 	
 	foreach($upgrades_arr as $file)
 	{
-       	preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $file, $rets);
-       	$a_version = $rets[1];
-	        	
-   		if (ConvertVersion($a_version) > ConvertVersion($version)) {
-   			$version = $a_version;
-   		}
+		if( preg_match('/inportal_upgrade_v(.*).(php|sql)$/', $file, $rets) )
+		{
+			$a_version = $rets[1];
+
+			if (ConvertVersion($a_version) > ConvertVersion($version)) {
+				$version = $a_version;
+			}
+		}
 	}
 	
 	return $version;