Index: t3lib/class.t3lib_pagerenderer.php
===================================================================
--- t3lib/class.t3lib_pagerenderer.php	(revision 9692)
+++ t3lib/class.t3lib_pagerenderer.php	(revision )
@@ -846,6 +846,9 @@
 			$type = 'text/javascript';
 		}
 		if (!isset($this->jsFiles[$file])) {
+			if (strpos($file, 'ajax.php?') !== FALSE) {
+				$compress = FALSE;
+			}
 			$this->jsFiles[$file] = array(
 				'type' => $type,
 				'section' => self::PART_HEADER,
@@ -870,6 +873,9 @@
 			$type = 'text/javascript';
 		}
 		if (!isset($this->jsFiles[$file])) {
+			if (strpos($file, 'ajax.php?') !== FALSE) {
+				$compress = FALSE;
+			}
 			$this->jsFiles[$file] = array(
 				'type' => $type,
 				'section' => self::PART_FOOTER,