Index: lams_central/web/css/thickbox.css
===================================================================
diff -u -rd28a91914e8858e0fbc045fc9313e3b50a309c45 -rf5f28e65d432b4911686667d4e6b6f5128934fa4
--- lams_central/web/css/thickbox.css	(.../thickbox.css)	(revision d28a91914e8858e0fbc045fc9313e3b50a309c45)
+++ lams_central/web/css/thickbox.css	(.../thickbox.css)	(revision f5f28e65d432b4911686667d4e6b6f5128934fa4)
@@ -38,7 +38,7 @@
 }
 #TB_window {
   position: fixed;
-  background: #ffffff;
+  background: #525252;
   z-index: 102;
   color:#000000;
   display:none;
@@ -129,13 +129,14 @@
 
 /* Added by LAMS. Enables scrolling on iOS devices. */
 #TB_window {
+	-webkit-overflow-scrolling: touch !important;
+	overflow-y: auto !important;
 	height:100%;
 	width:90%;
 	max-width: 1200px;
+	border-width: 4px 4px 2px 4px;/* to compensate TB_iframeContent's cut in height of 2px */
 }
 #TB_iframeContent {
-	overflow-y: auto !important;
-	-webkit-overflow-scrolling: touch !important;
-	height:100%;
+	height:calc(100% - 2px);
 	width:100%;
 }