diff --git public/javascripts/attachments.js public/javascripts/attachments.js
index 38dd06e597..a94ccea49d 100644
--- public/javascripts/attachments.js
+++ public/javascripts/attachments.js
@@ -278,7 +278,7 @@ function copyImageFromClipboard(e) {
   var items = clipboardData.items
   for (var i = 0 ; i < items.length ; i++) {
     var item = items[i];
-    if (item.type.indexOf("image") != -1) {
+    if (item.kind === 'file' && item.type.indexOf("image") != -1) {
       var blob = item.getAsFile();
       var date = new Date();
       var filename = 'clipboard-'