diff --git a/Graphs/gBarChart.cpp b/Graphs/gBarChart.cpp
index 2820647c..fda9dfed 100644
--- a/Graphs/gBarChart.cpp
+++ b/Graphs/gBarChart.cpp
@@ -150,7 +150,7 @@ void gBarChart::paint(gGraph & w,int left, int top, int width, int height)
     }
     if (total_days>0) {
         float val=total_val/float(total_days);
-        QString z=m_label+"="+QString::number(val,'f',2)+" days="+QString::number(total_days,'f',0)+" This needs optimising and will going in overview";
+        QString z=m_label+"="+QString::number(val,'f',2)+" days="+QString::number(total_days,'f',0)+" This will go in overview";
         w.renderText(z,left,top-1);
         // val = AHI for selected area.
     }
diff --git a/Graphs/gGraphView.cpp b/Graphs/gGraphView.cpp
index 1a0ef93a..13c30b30 100644
--- a/Graphs/gGraphView.cpp
+++ b/Graphs/gGraphView.cpp
@@ -1346,11 +1346,10 @@ void gGraphView::paintGL()
     bool threaded;
 
     // Tempory hack using this pref..
-    if (pref["EnableGraphSnapshots"].toBool() && (m_idealthreads>1)) {
+    if (pref["EnableMultithreading"].toBool() && (m_idealthreads>1)) {
         threaded=true;
     } else threaded=false;
 
-    threaded=false;
     for (int i=0;i<m_graphs.size();i++) {
         if (m_graphs[i]->isEmpty() || !m_graphs[i]->visible()) continue;
         numgraphs++;
@@ -1392,13 +1391,13 @@ void gGraphView::paintGL()
         GetTextExtent(m_emptytext,x,y,bigfont);
         AddTextQue(m_emptytext,(width()/2)-x/2,(height()/2)+y/2,0.0,col,bigfont);
     }
-    int thr=1;
-    if (threaded) thr=m_idealthreads;
+    int thr;
 
     if (threaded) {
+       thr=m_idealthreads;
        masterlock->acquire(m_idealthreads); // ask for all the CPU's back..
        masterlock->release(m_idealthreads);
-    }
+    } else thr=1;
 
     //((QGLContext*)context())->makeCurrent();
 
diff --git a/Graphs/gGraphView.h b/Graphs/gGraphView.h
index c9d2d47b..63ba353d 100644
--- a/Graphs/gGraphView.h
+++ b/Graphs/gGraphView.h
@@ -146,12 +146,12 @@ protected:
     QVector<GLBuffer *> mgl_buffers;
 
     // Default layer mouse handling = Do nothing
-    virtual bool wheelEvent(QWheelEvent * event) { return false; }
-    virtual bool mouseMoveEvent(QMouseEvent * event) { return false; }
-    virtual bool mousePressEvent(QMouseEvent * event) { return false; }
-    virtual bool mouseReleaseEvent(QMouseEvent * event) { return false; }
-    virtual bool mouseDoubleClickEvent(QMouseEvent * event) { return false; }
-    virtual bool keyPressEvent(QKeyEvent * event) { return false; }
+    virtual bool wheelEvent(QWheelEvent * event) { event=event; return false; }
+    virtual bool mouseMoveEvent(QMouseEvent * event) { event=event; return false; }
+    virtual bool mousePressEvent(QMouseEvent * event) { event=event; return false; }
+    virtual bool mouseReleaseEvent(QMouseEvent * event) { event=event; return false; }
+    virtual bool mouseDoubleClickEvent(QMouseEvent * event) { event=event; return false; }
+    virtual bool keyPressEvent(QKeyEvent * event) { event=event; return false; }
 };
 
 class LayerGroup:public Layer
diff --git a/Graphs/gYAxis.cpp b/Graphs/gYAxis.cpp
index 0be4262b..e20bbaae 100644
--- a/Graphs/gYAxis.cpp
+++ b/Graphs/gYAxis.cpp
@@ -139,13 +139,7 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
     double mny=miny;
     if (miny<0) {
         mny=-mxy;
-    } else {
     }
-    //double mny=MIN(fabs(maxy),fabs(miny));
-    //if (miny<0) mny=-mny;
-    //if (maxy<0) mxy=-mxy;
-    //mny=miny;
-    //mxy=maxy;
 
     double rxy=mxy-mny;
     double ymult=height/rxy;
@@ -163,11 +157,6 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
     }
     lines=w.backlines();
 
-    //double q=((maxy-(miny+(min_ytick/2.0)))/min_ytick)*4;
-    /*if (q>=maxverts) {
-        qDebug() << "Would exeed maxverts. Should be another two bounds exceeded messages after this. (I can do a minor optimisation by disabling the other checks if this turns out to be consistent)" << q << maxverts;
-    }*/
-
     for (double i=miny; i<=maxy+min_ytick-0.00001; i+=min_ytick) {
         ty=(i - miny) * ymult;
         if (dy<5) {
@@ -175,12 +164,10 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
         } else {
             fd=QString().sprintf("%.1f",i*m_yaxis_scale);
         }
-        //fd=Format(i*m_yaxis_scale); // Override this as a function.
+
         GetTextExtent(fd,x,y);
         if (x>labelW) labelW=x;
         h=top+height-ty;
-        //w.renderText(start_px-12-x,scry-(h-(y/2.0)),fd);
-        //DrawText(w,fd,left+width-8-x,(h+(y/2.0)),0,m_text_color);
         w.renderText(fd,left+width-8-x,(h+(y/2.0)),0,m_text_color);
 
         lines->add(left+width-4,h,left+width,h,m_line_color);
@@ -201,6 +188,5 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
             break;
         }
     }
-    //vertarray->draw();
 }
 
diff --git a/daily.cpp b/daily.cpp
index 91c8b33a..814be8d6 100644
--- a/daily.cpp
+++ b/daily.cpp
@@ -886,7 +886,7 @@ void Daily::Load(QDate date)
         // as it only relates to text drawing, which the Pie chart does not do
         // ^^ Scratch that.. pie now includes text..
 
-        if (pref["EnableGraphSnapshots"].toBool()) {  // AHI Pie Chart
+//        if (pref["EnableGraphSnapshots"].toBool()) {  // AHI Pie Chart
 //            if (ahi+rei+fli>0) {
 //                html+="</tr>\n<tr><td colspan=4 align=center><i>"+tr("Event Breakdown")+"</i></td></tr>\n";
 //                G_AHI->setFixedSize(gwwidth,120);
@@ -899,7 +899,7 @@ void Daily::Load(QDate date)
 //            } else {
 //                html += "<tr><td colspan=4 align=center><img src=\"qrc:/docs/0.0.gif\"></td></tr>\n";
 //            }
-        }
+//        }
     }
     html+="</table>";
     html+="<table cellspacing=0 cellpadding=0 border=0 width='100%'>\n";
@@ -945,7 +945,7 @@ void Daily::Load(QDate date)
     html+="<table cellspacing=0 cellpadding=0 border=0 width='100%'>\n";
 
     if (cpap) {
-        if (pref["EnableGraphSnapshots"].toBool()) {
+      //  if (pref["EnableGraphSnapshots"].toBool()) {
       /*      if (cpap->channelExists(CPAP_Pressure)) {
                 html+=("<tr><td colspan=4 align=center><i>")+tr("Time@Pressure")+("</i></td></tr>\n");
                 TAP->setFixedSize(gwwidth,30);
@@ -978,7 +978,7 @@ void Daily::Load(QDate date)
                 html+="<tr><td colspan=4 align=center><img src=\"data:image/png;base64," + byteArray.toBase64() + "\"></td></tr>\n";
             } */
 
-        }
+        //}
         html+="</table><hr height=2><table cellpadding=0 cellspacing=0 border=0 width=100%>";
         html+="<tr><td align=center>SessionID</td><td align=center>Date</td><td align=center>Start</td><td align=center>End</td></tr>";
         QDateTime fd,ld;
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5c33987d..85c0b433 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -100,8 +100,8 @@ MainWindow::MainWindow(QWidget *parent) :
         ui->logText->hide();
     }
 
-    if (!pref.Exists("EnableGraphSnapshots")) pref["EnableGraphSnapshots"]=false;
-    ui->actionDisplay_Graph_Snapshots->setChecked(pref["EnableGraphSnapshots"].toBool());
+    if (!pref.Exists("EnableMultithreading")) pref["EnableMultithreading"]=false;
+    ui->actionEnable_Multithreading->setChecked(pref["EnableMultithreading"].toBool());
 
 
     if (!pref.Exists("MemoryHog")) pref["MemoryHog"]=true;
@@ -367,13 +367,6 @@ void MainWindow::on_action_Preferences_triggered()
     }
 }
 
-void MainWindow::on_actionDisplay_Graph_Snapshots_toggled(bool checked)
-{
-    //if (QMessageBox::question(this,"Warning","Turning this feature on has caused crashes on some hardware configurations due to OpenGL/Qt bugs.\nIf you have already seen Pie Charts & CandleSticks in the left panel of daily view previously, you're not affected by this bug.\nAre you sure you want to enable this?",QMessageBox::Yes|QMessageBox::No)==QMessageBox::Yes) {
-        pref["EnableGraphSnapshots"]=checked;
-    //}
-}
-
 void MainWindow::on_oximetryButton_clicked()
 {
     if (oximetry) {
@@ -381,3 +374,8 @@ void MainWindow::on_oximetryButton_clicked()
         oximetry->RedrawGraphs();
     }
 }
+
+void MainWindow::on_actionEnable_Multithreading_toggled(bool checked)
+{
+    pref["EnableMultithreading"]=checked;
+}
diff --git a/mainwindow.h b/mainwindow.h
index fc141224..a5ab389f 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -78,10 +78,10 @@ private slots:
 
     void on_action_Preferences_triggered();
 
-    void on_actionDisplay_Graph_Snapshots_toggled(bool arg1);
-
     void on_oximetryButton_clicked();
 
+    void on_actionEnable_Multithreading_toggled(bool arg1);
+
 private:
     Ui::MainWindow *ui;
     Daily * daily;
diff --git a/mainwindow.ui b/mainwindow.ui
index 9910313b..e5800c2a 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -566,7 +566,7 @@
      <x>0</x>
      <y>0</y>
      <width>668</width>
-     <height>24</height>
+     <height>25</height>
     </rect>
    </property>
    <property name="sizePolicy">
@@ -594,7 +594,7 @@
     <addaction name="separator"/>
     <addaction name="actionUse_AntiAliasing"/>
     <addaction name="actionOverlay_Bars"/>
-    <addaction name="actionDisplay_Graph_Snapshots"/>
+    <addaction name="actionEnable_Multithreading"/>
     <addaction name="action_Link_Graphs"/>
     <addaction name="separator"/>
     <addaction name="action_Fullscreen"/>
@@ -734,7 +734,7 @@
     <string>&amp;Reset Graph Layout</string>
    </property>
   </action>
-  <action name="actionDisplay_Graph_Snapshots">
+  <action name="actionEnable_Multithreading">
    <property name="checkable">
     <bool>true</bool>
    </property>