diff --git a/CHANGELOG b/CHANGELOG
index f9f9466f..e574e479 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -55,6 +55,7 @@ pyqtgraph-0.9.9  [unreleased]
     - Added InfiniteLine.setHoverPen
     - Added GLVolumeItem.setData
     - Added PolyLineROI.setPoints, clearPoints, saveState, setState
+    - Added ErrorBarItem.setData
 
   Bugfixes:
     - PlotCurveItem now has correct clicking behavior--clicks within a few px
diff --git a/examples/ErrorBarItem.py b/examples/ErrorBarItem.py
index 3bbf06d1..cd576d51 100644
--- a/examples/ErrorBarItem.py
+++ b/examples/ErrorBarItem.py
@@ -7,7 +7,7 @@ Demonstrates basic use of ErrorBarItem
 import initExample ## Add path to library (just for examples; you do not need this)
 
 import pyqtgraph as pg
-from pyqtgraph.Qt import QtGui
+from pyqtgraph.Qt import QtGui, QtCore
 import numpy as np
 
 import pyqtgraph as pg
diff --git a/pyqtgraph/graphicsItems/ErrorBarItem.py b/pyqtgraph/graphicsItems/ErrorBarItem.py
index 7b681389..d7cb06db 100644
--- a/pyqtgraph/graphicsItems/ErrorBarItem.py
+++ b/pyqtgraph/graphicsItems/ErrorBarItem.py
@@ -8,15 +8,7 @@ __all__ = ['ErrorBarItem']
 class ErrorBarItem(GraphicsObject):
     def __init__(self, **opts):
         """
-        Valid keyword options are:
-        x, y, height, width, top, bottom, left, right, beam, pen
-        
-        x and y must be numpy arrays specifying the coordinates of data points.
-        height, width, top, bottom, left, right, and beam may be numpy arrays,
-        single values, or None to disable. All values should be positive.
-        
-        If height is specified, it overrides top and bottom.
-        If width is specified, it overrides left and right.
+        All keyword arguments are passed to setData().
         """
         GraphicsObject.__init__(self)
         self.opts = dict(
@@ -31,14 +23,35 @@ class ErrorBarItem(GraphicsObject):
             beam=None,
             pen=None
         )
-        self.setOpts(**opts)
+        self.setData(**opts)
+
+    def setData(self, **opts):
+        """
+        Update the data in the item. All arguments are optional.
         
-    def setOpts(self, **opts):
+        Valid keyword options are:
+        x, y, height, width, top, bottom, left, right, beam, pen
+        
+        * x and y must be numpy arrays specifying the coordinates of data points.
+        * height, width, top, bottom, left, right, and beam may be numpy arrays,
+          single values, or None to disable. All values should be positive.
+        * top, bottom, left, and right specify the lengths of bars extending
+          in each direction.
+        * If height is specified, it overrides top and bottom.
+        * If width is specified, it overrides left and right.
+        * beam specifies the width of the beam at the end of each bar.
+        * pen may be any single argument accepted by pg.mkPen().
+        """
         self.opts.update(opts)
         self.path = None
         self.update()
+        self.prepareGeometryChange()
         self.informViewBoundsChanged()
         
+    def setOpts(self, **opts):
+        # for backward compatibility
+        self.setData(**opts)
+        
     def drawPath(self):
         p = QtGui.QPainterPath()
         
diff --git a/pyqtgraph/graphicsItems/GraphicsItem.py b/pyqtgraph/graphicsItems/GraphicsItem.py
index 9fa323e2..c1a96a62 100644
--- a/pyqtgraph/graphicsItems/GraphicsItem.py
+++ b/pyqtgraph/graphicsItems/GraphicsItem.py
@@ -318,6 +318,8 @@ class GraphicsItem(object):
         vt = self.deviceTransform()
         if vt is None:
             return None
+        if isinstance(obj, QtCore.QPoint):
+            obj = QtCore.QPointF(obj)
         vt = fn.invertQTransform(vt)
         return vt.map(obj)