diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
index be603891d..41129d538 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
@@ -69,7 +69,7 @@ void RsGxsChannelPostsModel::setMode(TreeMode mode)
     if(mode == TREE_MODE_LIST)
         setNumColumns(2);
 
-    emit dataChanged(createIndex(0,0,(void*)NULL), createIndex(rowCount()-1,mColumns-1,(void*)NULL));
+    triggerViewUpdate();
 }
 
 void RsGxsChannelPostsModel::handleEvent_main_thread(std::shared_ptr<const RsEvent> event)
@@ -116,7 +116,7 @@ void RsGxsChannelPostsModel::handleEvent_main_thread(std::shared_ptr<const RsEve
 							{
 								mPosts[j] = posts[i];
 
-                                emit dataChanged(createIndex(0,0,(void*)NULL), createIndex(rowCount()-1,mColumns-1,(void*)NULL));
+                                triggerViewUpdate();
 							}
 					}
 				},this);
@@ -146,6 +146,10 @@ void RsGxsChannelPostsModel::postMods()
 {
 	endResetModel();
 
+    triggerViewUpdate();
+}
+void RsGxsChannelPostsModel::triggerViewUpdate()
+{
     emit dataChanged(createIndex(0,0,(void*)NULL), createIndex(rowCount()-1,mColumns-1,(void*)NULL));
 }
 
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
index 75464368e..7b9918518 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
@@ -111,6 +111,8 @@ public:
 	void updateChannel(const RsGxsGroupId& channel_group_id);
     const RsGxsGroupId& currentGroupId() const;
 
+    void triggerViewUpdate();
+
     void setNumColumns(int n);
     void setMode(TreeMode mode);
     TreeMode getMode() const { return mTreeMode; }
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
index 380d9467b..47964bab7 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
@@ -508,7 +508,9 @@ void GxsChannelPostsWidgetWithModel::switchView()
     selectItem(msg_id);
     ui->postsTree->setFocus();
 
-    ui->postsTree->dataChanged(QModelIndex(),QModelIndex());	// forces update of the whole tree
+    mChannelPostsModel->triggerViewUpdate();	// This is already called by setMode(), but the model cannot know how many
+                                                // columns is actually has until we call handlePostsTreeSizeChange(), so
+                                                // we have to call it again here.
 }
 
 void GxsChannelPostsWidgetWithModel::copyMessageLink()
@@ -581,7 +583,7 @@ void GxsChannelPostsWidgetWithModel::handlePostsTreeSizeChange(QSize s,bool forc
     int n_columns = std::max(1,(int)floor(s.width() / (mChannelPostsDelegate->cellSize(0,font(),ui->postsTree->width()))));
     std::cerr << "nb columns: " << n_columns << " current count=" << mChannelPostsModel->columnCount() << std::endl;
 
-    if(n_columns != mChannelPostsModel->columnCount())
+    if(force || (n_columns != mChannelPostsModel->columnCount()))
 		mChannelPostsModel->setNumColumns(n_columns);
 }
 
@@ -714,6 +716,7 @@ void GxsChannelPostsWidgetWithModel::updateGroupData()
         {
             mGroup = group;
 			mChannelPostsModel->updateChannel(groupId());
+            ui->filterLineEdit->clear();
 
             insertChannelDetails(mGroup);