--- a/src/pyams_skin/resources/css/ext/bootstrap-modal.css	Mon Sep 11 12:40:35 2017 +0200
+++ b/src/pyams_skin/resources/css/ext/bootstrap-modal.css	Mon Sep 11 12:40:47 2017 +0200
@@ -94,6 +94,14 @@
 	top: 50%;
 }
 
+.modal.in .modal-dialog {
+	-webkit-transform: none;
+	   -moz-transform: none;
+	    -ms-transform: none;
+	     -o-transform: none;
+	        transform: none;
+}
+
 .modal-body {
 	max-height: none;
 	overflow: visible;