diff --git a/src/main/java/org/gcube/portlets/user/newsfeed/client/panels/NewsFeedPanel.java b/src/main/java/org/gcube/portlets/user/newsfeed/client/panels/NewsFeedPanel.java
index 0db4500..ad8d9cc 100644
--- a/src/main/java/org/gcube/portlets/user/newsfeed/client/panels/NewsFeedPanel.java
+++ b/src/main/java/org/gcube/portlets/user/newsfeed/client/panels/NewsFeedPanel.java
@@ -1400,7 +1400,7 @@ public class NewsFeedPanel extends Composite {
 						Window.alert("Could not deliver this comment. Please try again in a short while.");			
 					}
 					else {
-						Comment comment = (Comment) result.getObject();
+						Comment comment = (Comment) result.getComment();
 						owner.addComment(new SingleComment(comment, owner, (comment.getUserid().equals(myUserInfo.getUsername()))));
 						owner.setCommentingDisabled(false);
 						owner.updateCommentsNumberCount();
@@ -1437,7 +1437,7 @@ public class NewsFeedPanel extends Composite {
 						//CheckSession.showLogoutDialog();
 					}
 					else {
-						Comment comment = (Comment) result.getObject();
+						Comment comment = (Comment) result.getComment();
 						owner.updateSingleComment(comment, commentPanel);
 						owner.setCommentingDisabled(false);
 					}
diff --git a/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java b/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
index a5a81aa..6521495 100644
--- a/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
@@ -1037,7 +1037,8 @@ public class NewsServiceImpl extends RemoteServiceServlet implements NewsService
 		else {
 			PortalContext pContext = PortalContext.getConfiguration();
 			String userName = pContext.getCurrentUser(getThreadLocalRequest()).getUsername();
-			ArrayList<ItemBean> allUsers = Utils.getDisplayableItemBeans("/"+PortalContext.getConfiguration().getInfrastructureName(), userName, isWithinPortal());
+			String context = pContext.getCurrentScope(getThreadLocalRequest());
+			ArrayList<ItemBean> allUsers = Utils.getDisplayableItemBeans(context, userName, isWithinPortal());
 			ArrayList<ItemBean> toReturn = new ArrayList<ItemBean>();
 			for (String fullName : fullNames) 
 				for (ItemBean puser : allUsers) {					
@@ -1049,6 +1050,8 @@ public class NewsServiceImpl extends RemoteServiceServlet implements NewsService
 			return toReturn;
 		}
 	}
+
+
 	/**
 	 * tell if the user is a portal administrator or not
 	 * @param username
diff --git a/src/main/java/org/gcube/portlets/user/newsfeed/shared/OperationResult.java b/src/main/java/org/gcube/portlets/user/newsfeed/shared/OperationResult.java
index a3553d9..6a3b954 100644
--- a/src/main/java/org/gcube/portlets/user/newsfeed/shared/OperationResult.java
+++ b/src/main/java/org/gcube/portlets/user/newsfeed/shared/OperationResult.java
@@ -1,23 +1,24 @@
 package org.gcube.portlets.user.newsfeed.shared;
 
-import java.io.Serializable;
+import org.gcube.portal.databook.shared.Comment;
 
-@SuppressWarnings("serial")
-public class OperationResult implements Serializable {
+import com.google.gwt.user.client.rpc.IsSerializable;
+
+public class OperationResult implements IsSerializable {
 	
 	private Boolean success;
 	private String message;
-	private Serializable object;
+	private Comment comment;
 	
 	public OperationResult() {
 		super();
 	}
 
-	public OperationResult(Boolean success, String message, Serializable object) {
+	public OperationResult(Boolean success, String message, Comment comment) {
 		super();
 		this.success = success;
 		this.message = message;
-		this.object = object;
+		this.comment = comment;
 	}
 
 	public Boolean isSuccess() {
@@ -36,13 +37,11 @@ public class OperationResult implements Serializable {
 		this.message = message;
 	}
 
-	public Serializable getObject() {
-		return object;
+	public Comment getComment() {
+		return comment;
 	}
 
-	public void setObject(Serializable object) {
-		this.object = object;
-	}
-	
-	
+	public void setComment(Comment comment) {
+		this.comment = comment;
+	}	
 }