image.js in tinymce-rails-3.4.5

- old
+ new

@@ -88,12 +88,16 @@
 		if (el && el.nodeName == 'IMG') {
 			ed.dom.setAttribs(el, args);
 			tinyMCEPopup.editor.execCommand('mceRepaint');
 			tinyMCEPopup.editor.focus();
 		} else {
-			ed.execCommand('mceInsertContent', false, '<img id="__mce_tmp" />', {skip_undo : 1});
-			ed.dom.setAttribs('__mce_tmp', args);
-			ed.dom.setAttrib('__mce_tmp', 'id', '');
+			tinymce.each(args, function(value, name) {
+				if (value === "") {
+					delete args[name];
+				}
+			});
+
+			ed.execCommand('mceInsertContent', false, tinyMCEPopup.editor.dom.createHTML('img', args), {skip_undo : 1});
 			ed.undoManager.add();
 		}
 
 		tinyMCEPopup.close();
 	},