diff --git a/retroshare-gui/src/gui/gxs/GxsCommentDialog.cpp b/retroshare-gui/src/gui/gxs/GxsCommentDialog.cpp
index 7b9e28131..4757b036e 100644
--- a/retroshare-gui/src/gui/gxs/GxsCommentDialog.cpp
+++ b/retroshare-gui/src/gui/gxs/GxsCommentDialog.cpp
@@ -95,8 +95,10 @@ void GxsCommentDialog::commentClear()
 }
 void GxsCommentDialog::commentLoad(const RsGxsGroupId &grpId, const std::set<RsGxsMessageId>& msg_versions,const RsGxsMessageId& most_recent_msgId,bool use_cache)
 {
+#ifdef DEBUG_COMMENT_DIALOG
 	std::cerr << "GxsCommentDialog::commentLoad(" << grpId << ", most recent msg version: " << most_recent_msgId << ")";
 	std::cerr << std::endl;
+#endif
 
 	mGrpId = grpId;
 	mMostRecentMsgId = most_recent_msgId;
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
index e9be3e6ed..a42587d85 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.cpp
@@ -176,6 +176,25 @@ int RsGxsChannelPostsModel::rowCount(const QModelIndex& parent) const
     return 0;
 }
 
+int RsGxsChannelPostsModel::columnCount(int row) const
+{
+    if(mTreeMode == TREE_MODE_GRID)
+    {
+        if(row+1 == rowCount())
+        {
+            int r = ((int)mFilteredPosts.size() % (int)mColumns);
+
+            if(r > 0)
+                return r;
+            else
+                return columnCount();
+        }
+        else
+            return columnCount();
+    }
+    else
+        return 2;
+}
 int RsGxsChannelPostsModel::columnCount(const QModelIndex &/*parent*/) const
 {
     if(mTreeMode == TREE_MODE_GRID)
@@ -245,7 +264,7 @@ bool RsGxsChannelPostsModel::convertRefPointerToTabEntry(quintptr ref, uint32_t&
 
 QModelIndex RsGxsChannelPostsModel::index(int row, int column, const QModelIndex & parent) const
 {
-    if(row < 0 || column < 0 || column >= (int)mColumns)
+    if(row < 0 || column < 0 || row >= rowCount() || column >= columnCount(row))
 		return QModelIndex();
 
     quintptr ref = getChildRef(parent.internalId(),(mTreeMode == TREE_MODE_GRID)?(column + row*mColumns):row);
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
index 42dcbb9f7..c447f11a3 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsModel.h
@@ -105,6 +105,7 @@ public:
 
 	QModelIndex root() const{ return createIndex(0,0,(void*)NULL) ;}
 	QModelIndex getIndexOfMessage(const RsGxsMessageId& mid) const;
+    int columnCount(int row) const; // columns in the row of this particular index.
 
 	std::vector<std::pair<time_t,RsGxsMessageId> > getPostVersions(const RsGxsMessageId& mid) const;
 
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
index a6ce946f5..ea27be6f9 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.cpp
@@ -504,6 +504,30 @@ GxsChannelPostsWidgetWithModel::GxsChannelPostsWidgetWithModel(const RsGxsGroupI
     }, mEventHandlerId, RsEventType::GXS_CHANNELS );
 }
 
+void GxsChannelPostsWidgetWithModel::keyPressEvent(QKeyEvent *e)
+{
+    QModelIndex index = ui->postsTree->selectionModel()->currentIndex();
+
+    if(index.isValid() && mChannelPostsModel->getMode() == RsGxsChannelPostsModel::TREE_MODE_GRID)
+    {
+        int n = mChannelPostsModel->columnCount(index.row())-1;
+
+        if(e->key() == Qt::Key_Left && index.column()==0)
+        {
+            ui->postsTree->setCurrentIndex(index.siblingAtColumn(n));
+            e->accept();
+            return;
+        }
+        if(e->key() == Qt::Key_Right && index.column()==n)
+        {
+            ui->postsTree->setCurrentIndex(index.siblingAtColumn(0));
+            e->accept();
+            return;
+        }
+    }
+
+    GxsMessageFrameWidget::keyPressEvent(e);
+}
 void GxsChannelPostsWidgetWithModel::resizeEvent(QResizeEvent *e)
 {
     GxsMessageFrameWidget::resizeEvent(e);
diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.h b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.h
index 9cfcaae21..8891b57dd 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.h
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelPostsWidgetWithModel.h
@@ -139,6 +139,7 @@ protected:
 	/* GxsMessageFrameWidget */
     virtual void setAllMessagesReadDo(bool read) override;
     virtual void resizeEvent(QResizeEvent *e) override;
+    virtual void keyPressEvent(QKeyEvent *e) override;
 
 private slots:
 	void showPostDetails();