Index: typo3/mod/tools/em/class.em_index.php
===================================================================
--- typo3/mod/tools/em/class.em_index.php	(revision 7609)
+++ typo3/mod/tools/em/class.em_index.php	(working copy)
@@ -1873,6 +1873,7 @@
 			// check if extension can be fetched
 		if(isset($this->xmlhandler->extensionsXML[$extKey])) {
 			$versions = array_keys($this->xmlhandler->extensionsXML[$extKey]['versions']);
+			natsort($versions);
 			$latestVersion = end($versions);
 			switch($mode) {
 				case EM_INSTALL_VERSION_STRICT:
@@ -2004,6 +2005,7 @@
 				// Fetch extension from TER:
 			if(!strlen($version)) {
 				$versions = array_keys($this->xmlhandler->extensionsXML[$extKey]['versions']);
+				natsort($versions);
 				$version = end($versions);
 			}
 			$fetchData = $this->terConnection->fetchExtension($extKey, $version, $this->xmlhandler->extensionsXML[$extKey]['versions'][$version]['t3xfilemd5'], $this->getMirrorURL());