diff --git a/README b/README
index 26613cd..a580908 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 --------------------------------
-Commercial Charts Add-on Preview
+Commercial Charts Add-on Beta
 --------------------------------
 
 Whats in Qt Commercial Charts
@@ -46,15 +46,12 @@ into "doc/html" in the build directory.
 
 KNOWN ISSUES
 ============
- * The preview version of Qt Commercial Charts is still under development
-      and thus should not be used in e.g. product development
- * The Charts API might change between the Preview and first official release
+ * The Charts API should be stable, but might still change between the Beta and first official release
  * Some areas will be refactored before the first official release
- * Qt Designer plugin is missing
  * Enable/disable tooltip is missing from the API
  * Mutliple axis are not suported at the moment.
  * Logartmic, polar axis are not supported at the moment.
- * Getting data from QAbstractItemModel is not feature complete.
+ * Model support for QBarSeries is not complete.
  * Interlnal layout hadnling is not working properly.
  * The QML Bindings are still under development and to be considered as early draft
- * All the current QML APIs are shown in qmlchart demo app
\ No newline at end of file
+ * All the current QML APIs are shown in qmlchart demo app
diff --git a/examples/stackedbarchartdrilldown/drilldownseries.cpp b/examples/stackedbarchartdrilldown/drilldownseries.cpp
index b767cb4..2a81057 100644
--- a/examples/stackedbarchartdrilldown/drilldownseries.cpp
+++ b/examples/stackedbarchartdrilldown/drilldownseries.cpp
@@ -25,6 +25,7 @@ QTCOMMERCIALCHART_USE_NAMESPACE
 DrilldownBarSeries::DrilldownBarSeries(QStringList categories, QObject *parent)
     : QStackedBarSeries(parent)
 {
+    Q_UNUSED(categories);
 }
 
 void DrilldownBarSeries::mapDrilldownSeries(int index, DrilldownBarSeries* drilldownSeries)
diff --git a/src/barchart/qbarseries.cpp b/src/barchart/qbarseries.cpp
index e79e456..be1b07a 100644
--- a/src/barchart/qbarseries.cpp
+++ b/src/barchart/qbarseries.cpp
@@ -247,7 +247,11 @@ bool QBarSeries::insert(int index, QBarSet *set)
 void QBarSeries::clear()
 {
     Q_D(QBarSeries);
-    d->remove(barSets());
+    bool success = d->remove(barSets());
+    if (success) {
+        emit barsetsRemoved(sets);
+    }
+    return success;
 }
 
 /*!
diff --git a/src/splinechart/qsplineseries.cpp b/src/splinechart/qsplineseries.cpp
index fa84abd..ffa2a81 100644
--- a/src/splinechart/qsplineseries.cpp
+++ b/src/splinechart/qsplineseries.cpp
@@ -109,8 +109,7 @@ void QSplineSeriesPrivate::calculateControlPoints()
     }
 
     // Calculate first Bezier control points
-    // Right hand side vector
-    //  Set of equations for P0 to Pn points.
+    // Set of equations for P0 to Pn points.
     //
     //  |   2   1   0   0   ... 0   0   0   ... 0   0   0   |   |   P1_1    |   |   P0 + 2 * P1             |
     //  |   1   4   1   0   ... 0   0   0   ... 0   0   0   |   |   P1_2    |   |   4 * P1 + 2 * P2         |