Index: trunk/packages/ezjscore_extension/ezextension/ezjscore/CHANGELOG
===================================================================
--- trunk/packages/ezjscore_extension/ezextension/ezjscore/CHANGELOG	(revision 169)
+++ trunk/packages/ezjscore_extension/ezextension/ezjscore/CHANGELOG	(working copy)
@@ -1,7 +1,7 @@
 # v1.2.0alpha1
 - Fixed bug #16393: TC-36 - eZFlow + eZFind show-facets and enable-spellchecker always enabled
 - Upgraded YUI 3.x from 3.0.0 to 3.1.0
-
+- Fixed bug #16669: wrong content-type header for packed js/css files using clustering
 
 # v1.1.0rc1
 - Fixed bug #16456: ezjscore not cluster aware?
Index: trunk/packages/ezjscore_extension/ezextension/ezjscore/classes/ezjscpacker.php
===================================================================
--- trunk/packages/ezjscore_extension/ezextension/ezjscore/classes/ezjscpacker.php	(revision 168)
+++ trunk/packages/ezjscore_extension/ezextension/ezjscore/classes/ezjscpacker.php	(working copy)
@@ -389,6 +389,7 @@
 
         // Merge file content and create new cache file
         $content = '';
+        $isCSS = strpos($fileExtension, '.css') !== false;
         foreach( $validFiles as $file)
         {
             // if this is a js / css generator, call to get content
@@ -412,7 +413,7 @@
             }
 
             // we need to fix relative background image paths if this is a css file
-            if ( strpos($fileExtension, '.css') !== false )
+            if ( $isCSS )
             {
                 $fileContent = ezjscPacker::fixImgPaths( $fileContent, $file );
             }
@@ -425,14 +426,16 @@
         // Pack the file to save bandwidth
         if ( $packLevel > 1 )
         {
-            if ( strpos($fileExtension, '.css') !== false )
+            if ( $isCSS )
                 $content = ezjscPacker::optimizeCSS( $content, $packLevel );
             else
                 $content = ezjscPacker::optimizeScript( $content, $packLevel );
         }
 
+        $contentType = $isCSS ? 'text/css' : 'text/javascript';
+
         // save file and return path
-        $clusterFileHandler->fileStoreContents( $cachePath, $content );
+        $clusterFileHandler->fileStoreContents( $cachePath, $content, 'ezjscore', $contentType );
         $httpFiles[] = $packerInfo['custom_host'] . $packerInfo['www_dir'] . $cachePath;
 
         return $httpFiles;