Index: /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QITreeWidget.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QITreeWidget.cpp	(revision 64776)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/extensions/QITreeWidget.cpp	(revision 64777)
@@ -210,5 +210,5 @@
         return QAccessible::List;
 
-    /* TreeItem by default: */
+    /* ListItem by default: */
     return QAccessible::ListItem;
 }
@@ -231,4 +231,13 @@
         state.focused = true;
         state.selected = true;
+    }
+
+    /* Compose the state of checked item: */
+    if (   item()
+        && item()->checkState(0) != Qt::Unchecked)
+    {
+        state.checked = true;
+        if (item()->checkState(0) == Qt::PartiallyChecked)
+            state.checkStateMixed = true;
     }