--- Horde/Themes/Css/Compress.php	2018-09-26 14:56:32.953997836 +0200
+++ Horde/Themes/Css/Compress.php	2018-11-08 09:06:01.710961169 +0100
@@ -41,7 +41,7 @@
         }
 
         $parser = new Horde_CssMinify_CssParser($files, array(
-            'dataurl' => (empty($conf['nobase64_img']) && $browser->hasFeature('dataurl')) ? array($this, 'dataurlCallback') : null,
+            'dataurl' => ($browser->hasFeature('dataurl')) ? array($this, 'dataurlCallback') : null,
             'import' => array($this, 'importCallback'),
             'logger' => $injector->getInstance('Horde_Log_Logger')
         ));