Index: base/univention-system-activation/css/tabs.styl
===================================================================
--- base/univention-system-activation/css/tabs.styl	(Revision 62439)
+++ base/univention-system-activation/css/tabs.styl	(Arbeitskopie)
@@ -42,7 +42,8 @@
 		transition: opacity 1s ease-in-out;
 		width: 100%;
 		height: 32px;
-		background: url(icons/loading-bubbles.svg) no-repeat;
+		background: url(icons/loading-bubbles.gif) no-repeat;
+		background-size: 42px 16px;
 		background-position: center center;
 	}