Index: src/main/java/net/jforum/view/forum/common/TopicsCommon.java
===================================================================
--- src/main/java/net/jforum/view/forum/common/TopicsCommon.java	(revision 194)
+++ src/main/java/net/jforum/view/forum/common/TopicsCommon.java	(working copy)
@@ -272,6 +272,10 @@
 			TopicDAO dao = DataAccessDriver.getInstance().newTopicDAO();
 			List<User> usersToNotify = dao.notifyUsers(topic);
 
+			// filter users - don't send notifications if they are subscribed to a topic that has
+			//  been moved to a restricted category / forum.
+			removeUsersWithNoAccessToTopic(topic, usersToNotify);
+			
 			// We only have to send an email if there are users
 			// subscribed to the topic
 			if (usersToNotify != null && !usersToNotify.isEmpty()) {
@@ -281,6 +285,39 @@
 	}
 	
 	/**
+	 * If the user cannot access the topic (forum or category limits), then remove the user
+	 * from the notification list.
+	 * 
+	 * @param topic
+	 * @param usersToNotify
+	 */
+	private static void removeUsersWithNoAccessToTopic(Topic topic,
+			List<User> usersToNotify) {
+
+		// If we got so far, this can't possibly be null. And if by chance it is, no need to notify, might as
+		//  well just crash.
+		Forum forum = ForumRepository.getForum(topic.getForumId());
+		
+		Iterator<User> userIterator = usersToNotify.iterator();
+		
+		while(userIterator.hasNext()) {
+			User user = userIterator.next();
+			
+			// do same check as isTopicAccessible method above. if user doesn't have access to the category
+			//  remove it from the list so that there are no categories sent.
+			if (!ForumRepository.isCategoryAccessible(user.getId(), forum.getCategoryId())) {
+				userIterator.remove();
+			}
+			
+			// apparently, for forums you can disable access to some groups. Hopefully this method checks
+			//  not tested.
+			if (!ForumRepository.isForumAccessible(user.getId(), forum.getCategoryId(), forum.getId())) {
+				userIterator.remove();
+			}
+		}
+	}
+
+	/**
 	 * Updates the board status after a new post is inserted.
 	 * This method is used in conjunct with moderation manipulation. 
 	 * It will increase by 1 the number of replies of the tpoic, set the