diff --git a/examples/Arrow.py b/examples/Arrow.py
index 2cbff113..d5ea2a74 100644
--- a/examples/Arrow.py
+++ b/examples/Arrow.py
@@ -2,7 +2,7 @@
 """
 Display an animated arrowhead following a curve.
 This example uses the CurveArrow class, which is a combination
-of ArrowItem and CurvePoint. 
+of ArrowItem and CurvePoint.
 
 To place a static arrow anywhere in a scene, use ArrowItem.
 To attach other types of item to a curve, use CurvePoint.
@@ -45,6 +45,7 @@ p.setRange(QtCore.QRectF(-20, -10, 60, 20))
 ## Animated arrow following curve
 c = p2.plot(x=np.sin(np.linspace(0, 2*np.pi, 1000)), y=np.cos(np.linspace(0, 6*np.pi, 1000)))
 a = pg.CurveArrow(c)
+a.setStyle(headLen=40)
 p2.addItem(a)
 anim = a.makeAnimation(loop=-1)
 anim.start()
diff --git a/examples/SimplePlot.py b/examples/SimplePlot.py
index f572743a..b4dba1ff 100644
--- a/examples/SimplePlot.py
+++ b/examples/SimplePlot.py
@@ -1,5 +1,6 @@
 import initExample ## Add path to library (just for examples; you do not need this)
 
+from os.path import *
 from pyqtgraph.Qt import QtGui, QtCore
 import pyqtgraph as pg
 import numpy as np
@@ -7,7 +8,7 @@ plt = pg.plot(np.random.normal(size=100), title="Simplest possible plotting exam
 plt.getAxis('bottom').setTicks([[(x*20, str(x*20)) for x in range(6)]])
 ## Start Qt event loop unless running in interactive mode or using pyside.
 ex = pg.exporters.SVGExporter.SVGExporter(plt.plotItem.scene())
-ex.export('/home/luke/tmp/test.svg')
+ex.export(join(dirname(__file__), 'test.svg'))
 
 if __name__ == '__main__':
     import sys
diff --git a/pyqtgraph/graphicsItems/ArrowItem.py b/pyqtgraph/graphicsItems/ArrowItem.py
index b15fc664..275f9250 100644
--- a/pyqtgraph/graphicsItems/ArrowItem.py
+++ b/pyqtgraph/graphicsItems/ArrowItem.py
@@ -70,13 +70,16 @@ class ArrowItem(QtGui.QGraphicsPathItem):
         brush             The brush used to fill the arrow.
         ================= =================================================
         """
-        self.opts = opts
+        try:
+            self.opts.update(opts)
+        except AttributeError:
+            self.opts = opts
         
         opt = dict([(k,self.opts[k]) for k in ['headLen', 'tipAngle', 'baseAngle', 'tailLen', 'tailWidth']])
         self.path = fn.makeArrowPath(**opt)
         self.setPath(self.path)
         
-        if opts['pxMode']:
+        if self.opts['pxMode']:
             self.setFlags(self.flags() | self.ItemIgnoresTransformations)
         else:
             self.setFlags(self.flags() & ~self.ItemIgnoresTransformations)
@@ -121,4 +124,4 @@ class ArrowItem(QtGui.QGraphicsPathItem):
         return pad
         
         
-    
\ No newline at end of file
+    
diff --git a/pyqtgraph/graphicsItems/AxisItem.py b/pyqtgraph/graphicsItems/AxisItem.py
index b483f0e4..66efeda5 100644
--- a/pyqtgraph/graphicsItems/AxisItem.py
+++ b/pyqtgraph/graphicsItems/AxisItem.py
@@ -688,7 +688,7 @@ class AxisItem(GraphicsWidget):
         ## determine mapping between tick values and local coordinates
         dif = self.range[1] - self.range[0]
         if dif == 0:
-            xscale = 1
+            xScale = 1
             offset = 0
         else:
             if axis == 0:
@@ -806,10 +806,10 @@ class AxisItem(GraphicsWidget):
                 ## measure all text, make sure there's enough room
                 if axis == 0:
                     textSize = np.sum([r.height() for r in textRects])
-                    textSize2 = np.max([r.width() for r in textRects])
+                    textSize2 = np.max([r.width() for r in textRects]) if textRects else 0
                 else:
                     textSize = np.sum([r.width() for r in textRects])
-                    textSize2 = np.max([r.height() for r in textRects])
+                    textSize2 = np.max([r.height() for r in textRects]) if textRects else 0
 
                 ## If the strings are too crowded, stop drawing text now.
                 ## We use three different crowding limits based on the number
diff --git a/pyqtgraph/graphicsItems/CurvePoint.py b/pyqtgraph/graphicsItems/CurvePoint.py
index f981bdf8..bb6beebc 100644
--- a/pyqtgraph/graphicsItems/CurvePoint.py
+++ b/pyqtgraph/graphicsItems/CurvePoint.py
@@ -112,6 +112,6 @@ class CurveArrow(CurvePoint):
         self.arrow = ArrowItem.ArrowItem(**opts)
         self.arrow.setParentItem(self)
         
-    def setStyle(**opts):
+    def setStyle(self, **opts):
         return self.arrow.setStyle(**opts)