second round of public beta bugfixes:

- fixed a bug in navigation between conferences via post links
- fixed the "your post is 'new'" bug (this was actually another bug, in
  postNewMessage())
- some other stuff

src/com/silverwrist/venice/servlets/format/TopicPosts.java

@@ -20,6 +20,7 @@ package com.silverwrist.venice.servlets.format;
 import java.util.*;
 import javax.servlet.*;
 import javax.servlet.http.*;
+import org.apache.log4j.*;
 import com.silverwrist.util.StringUtil;
 import com.silverwrist.venice.core.*;
 
@@ -30,6 +31,8 @@ public class TopicPosts implements JSPRender
    *--------------------------------------------------------------------------------
    */
 
+  private static Category logger = Category.getInstance(TopicPosts.class);
+
   // Attribute name for request attribute
   protected static final String ATTR_NAME = "com.silverwrist.venice.content.TopicPosts";
 
@@ -60,6 +63,10 @@ public class TopicPosts implements JSPRender
 		    TopicContext topic, int first, int last, boolean read_new, boolean show_advanced)
       throws DataException, AccessError
   {
+    if (logger.isDebugEnabled())
+      logger.debug("TopicPosts: sig=" + sig.getSIGID() + ", conf=" + conf.getConfID() + ", topic="
+		   + topic.getTopicNumber() + ", range=[" + first + ", " + last + "], rnm=" + read_new
+		   + ", shac=" + show_advanced);
     this.engine = engine;
     this.sig = sig;
     this.conf = conf;
@@ -70,9 +77,12 @@ public class TopicPosts implements JSPRender
     this.unread = topic.getUnreadMessages();
     if (read_new)
       topic.setUnreadMessages(0);
+    if (logger.isDebugEnabled())
+      logger.debug(this.unread + " unread messages");
     this.messages = topic.getMessages(first,last);
     this.visit_order = TopicVisitOrder.retrieve(request.getSession(true),conf.getConfID());
-    visit_order.visit(topic.getTopicNumber());
+    if (visit_order!=null)
+      visit_order.visit(topic.getTopicNumber());
     List aliases = conf.getAliases();
     topic_stem = (String)(aliases.get(0)) + "." + String.valueOf(topic.getTopicNumber()) + ".";
 
@@ -173,7 +183,10 @@ public class TopicPosts implements JSPRender
 
   public int getNextTopicNumber()
   {
-    return visit_order.getNext();
+    if (visit_order!=null)
+      return visit_order.getNext();
+    else
+      return -1;
 
   } // end getNextTopicNumber
 
@@ -203,8 +216,9 @@ public class TopicPosts implements JSPRender
   public String getNextLocator()
   {
     StringBuffer buf = new StringBuffer("sig=");
-    buf.append(sig.getSIGID()).append("&conf=").append(conf.getConfID()).append("&top=");
-    buf.append(visit_order.getNext());
+    buf.append(sig.getSIGID()).append("&conf=").append(conf.getConfID());
+    if (visit_order!=null)
+      buf.append("&top=").append(visit_order.getNext());
     return buf.toString();
 
   } // end getNextLocator
@@ -257,7 +271,10 @@ public class TopicPosts implements JSPRender
 
   public boolean canDoNextTopic()
   {
-    return visit_order.isNext();
+    if (visit_order!=null)
+      return visit_order.isNext();
+    else
+      return false;
 
   } // end canDoNextTopic