diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/DataSetMetadataPanel.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/DataSetMetadataPanel.java
index 0a36623eb929eb1ecde9b6174781164692e55f01..a3548c6416839afa66005d9d3fdb55066dc3ed23 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/DataSetMetadataPanel.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/DataSetMetadataPanel.java
@@ -38,8 +38,8 @@ import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
-import java.util.concurrent.BlockingDeque;
-import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
 
 import javax.swing.AbstractButton;
 import javax.swing.ButtonGroup;
@@ -91,7 +91,7 @@ public class DataSetMetadataPanel extends JPanel
 
     private static final long serialVersionUID = 1L;
 
-    private final BlockingDeque<Boolean> validationQueue = new LinkedBlockingDeque<Boolean>();
+    private final BlockingQueue<Boolean> validationQueue = new LinkedBlockingQueue<Boolean>();
 
     private final JFrame mainWindow;
 
diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/ErrorsPanel.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/ErrorsPanel.java
index f22564ac6c96644bbe291c2ad16f06811d90bf51..9e8bf99ee7657b9332d9aa51013a6ffb39afb2d9 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/ErrorsPanel.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/client/api/gui/ErrorsPanel.java
@@ -112,15 +112,15 @@ public class ErrorsPanel extends JPanel implements HyperlinkListener
         for (ValidationError error : errors)
         {
             sb.append(
-                    "<center><div style='align: center' ><a href='http://openbis.ch/"
-                            + (counter++)
-                            + "' style='color: black; text-decoration: none; font-style: normal; vertical-align: middle' ><img border='0' hspace='10' src='")
-                    .append(WRONG_ICON_URL).append("' />")
+                    "<center><div><a href='http://openbis.ch/" + (counter++)
+                            + "' ><img border='0' hspace='10' src='").append(WRONG_ICON_URL)
+                    .append("' ></img><font color='black'>")
                     .append(truncateErrorMessage(error.getErrorMessage()))
-                    .append(" [...]</a></div></center>");
+                    .append(" [...]</font></a></div></center>");
         }
 
         errorsArea.setText(sb.toString());
+        System.out.println(errorsArea.getText());
     }
 
     private String truncateErrorMessage(String errorMessage)