diff --git a/GraphicsView.py b/GraphicsView.py
index edfc2d86..dda96506 100644
--- a/GraphicsView.py
+++ b/GraphicsView.py
@@ -226,15 +226,14 @@ class GraphicsView(QtGui.QGraphicsView):
     
     
     def wheelEvent(self, ev):
+        QtGui.QGraphicsView.wheelEvent(self, ev)
         if not self.mouseEnabled:
             return
-        QtGui.QGraphicsView.wheelEvent(self, ev)
         sc = 1.001 ** ev.delta()
         #self.scale *= sc
         #self.updateMatrix()
         self.scale(sc, sc)
         
-        
     def setAspectLocked(self, s):
         self.aspectLocked = s
         
diff --git a/PlotItem.py b/PlotItem.py
index 286e621e..336e659d 100644
--- a/PlotItem.py
+++ b/PlotItem.py
@@ -953,7 +953,7 @@ class PlotItem(QtGui.QGraphicsWidget):
         if arr.ndim != 1:
             raise Exception("Array must be 1D to plot (shape is %s)" % arr.shape)
         if x is None:
-            x = arange(arr.shape[0])
+            x = np.arange(arr.shape[0])
         if x.ndim != 1:
             raise Exception("X array must be 1D to plot (shape is %s)" % x.shape)
         c = PlotCurveItem(arr, x=x)
diff --git a/examples/test_PlotWidget.py b/examples/test_PlotWidget.py
index 8c98ca22..76dab924 100755
--- a/examples/test_PlotWidget.py
+++ b/examples/test_PlotWidget.py
@@ -5,6 +5,7 @@ import sys, os
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..'))
 
 from scipy import random
+from numpy import array, arange
 from PyQt4 import QtGui, QtCore
 from pyqtgraph.PlotWidget import *
 from pyqtgraph.graphicsItems import *
@@ -90,4 +91,4 @@ for i in range(0, 5):
         yd, xd = rand(10000)
         pw2.plot(y=yd*(j+1), x=xd, params={'iter': i, 'val': j})
     
-#app.exec_()
+app.exec_()
diff --git a/graphicsItems.py b/graphicsItems.py
index a5ac37f6..bd6bff35 100644
--- a/graphicsItems.py
+++ b/graphicsItems.py
@@ -1458,8 +1458,10 @@ class ScaleItem(QtGui.QGraphicsWidget):
         else:
             xs = bounds.width() / dif
             
+        tickPositions = set() # remembers positions of previously drawn ticks
         ## draw ticks and text
-        for i in [i1, i1+1, i1+2]:  ## draw three different intervals
+        ## draw three different intervals, long ticks first
+        for i in reversed([i1, i1+1, i1+2]):
             if i > len(intervals):
                 continue
             ## spacing for this interval
@@ -1503,7 +1505,11 @@ class ScaleItem(QtGui.QGraphicsWidget):
                 if p1[1-axis] < 0:
                     continue
                 p.setPen(QtGui.QPen(QtGui.QColor(100, 100, 100, a)))
-                p.drawLine(Point(p1), Point(p2))
+                # draw tick only if there is none
+                tickPos = p1[1-axis]
+                if tickPos not in tickPositions:
+                    p.drawLine(Point(p1), Point(p2))
+                    tickPositions.add(tickPos)
                 if i == textLevel:
                     if abs(v) < .001 or abs(v) >= 10000:
                         vstr = "%g" % (v * self.scale)
@@ -1728,7 +1734,16 @@ class ViewBox(QtGui.QGraphicsWidget):
         #self.replot(autoRange=False)
         #self.updateMatrix()
         
-        
+    def wheelEvent(self, ev):
+        mask = np.array(self.mouseEnabled, dtype=np.float)
+        degree = ev.delta() / 8.0;
+        dif = np.array([degree, degree])
+        s = ((mask * 0.02) + 1) ** dif
+        center = Point(self.childGroup.transform().inverted()[0].map(ev.pos()))
+        self.scaleBy(s, center)
+        self.emit(QtCore.SIGNAL('rangeChangedManually'), self.mouseEnabled)
+        ev.accept()
+
     def mouseMoveEvent(self, ev):
         QtGui.QGraphicsWidget.mouseMoveEvent(self, ev)
         pos = np.array([ev.pos().x(), ev.pos().y()])