diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/itemviews/qcolumnview.cpp
--- a/src/gui/itemviews/qcolumnview.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/itemviews/qcolumnview.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -672,8 +672,8 @@
     QAbstractItemView *view = 0;
     if (model->hasChildren(index)) {
         view = q->createColumn(index);
-        q->connect(view, SIGNAL(clicked(const QModelIndex &)),
-                   q, SLOT(_q_clicked(const QModelIndex &)));
+        q->connect(view, SIGNAL(clicked(QModelIndex)),
+                   q, SLOT(_q_clicked(QModelIndex)));
     } else {
         if (!previewColumn)
             setPreviewWidget(new QWidget(q));
@@ -681,16 +681,16 @@
         view->setMinimumWidth(qMax(view->minimumWidth(), previewWidget->minimumWidth()));
     }
 
-    q->connect(view, SIGNAL(activated(const QModelIndex &)),
-            q, SIGNAL(activated(const QModelIndex &)));
-    q->connect(view, SIGNAL(clicked(const QModelIndex &)),
-            q, SIGNAL(clicked(const QModelIndex &)));
-    q->connect(view, SIGNAL(doubleClicked(const QModelIndex &)),
-            q, SIGNAL(doubleClicked(const QModelIndex &)));
-    q->connect(view, SIGNAL(entered(const QModelIndex &)),
-            q, SIGNAL(entered(const QModelIndex &)));
-    q->connect(view, SIGNAL(pressed(const QModelIndex &)),
-            q, SIGNAL(pressed(const QModelIndex &)));
+    q->connect(view, SIGNAL(activated(QModelIndex)),
+            q, SIGNAL(activated(QModelIndex)));
+    q->connect(view, SIGNAL(clicked(QModelIndex)),
+            q, SIGNAL(clicked(QModelIndex)));
+    q->connect(view, SIGNAL(doubleClicked(QModelIndex)),
+            q, SIGNAL(doubleClicked(QModelIndex)));
+    q->connect(view, SIGNAL(entered(QModelIndex)),
+            q, SIGNAL(entered(QModelIndex)));
+    q->connect(view, SIGNAL(pressed(QModelIndex)),
+            q, SIGNAL(pressed(QModelIndex)));
 
     view->setFocusPolicy(Qt::NoFocus);
     view->setParent(viewport);