IE < 10 does not support gradients.

Tom

2014-11-17 3f6995c70e8b15f7abf1785eb780a0de46f8bd07

 src/main/java/com/gitblit/wicket/panels/CommentPanel.java

@@ -89,7 +89,7 @@
         }
      }.setVisible(ticket != null && ticket.number > 0));

      final IModel<String> markdownPreviewModel = new Model<String>();
      final IModel<String> markdownPreviewModel = Model.of();
      markdownPreview = new Label("markdownPreview", markdownPreviewModel);
      markdownPreview.setEscapeModelStrings(false);
      markdownPreview.setOutputMarkupId(true);