diff --git a/package.sh b/package.sh
index ae1fec5..67bd6d2 100755
--- a/package.sh
+++ b/package.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-SCOURVER="0.17"
+SCOURVER="0.18"
 cd ..
 tar cvf scour/tarballs/scour-$SCOURVER.tar scour/scour.py scour/svg_regex.py scour/LICENSE scour/NOTICE scour/README.txt scour/release-notes.html
 gzip scour/tarballs/scour-$SCOURVER.tar
diff --git a/release-notes.html b/release-notes.html
index f07cc09..8424c5e 100644
--- a/release-notes.html
+++ b/release-notes.html
@@ -9,6 +9,16 @@
 
 <p>Copyright 2009, Jeff Schiller</p>
 
+<section id="0.18">
+	<header>
+		<h2><a href="#0.18">Version 0.18</a></h2>
+	</header>
+	<p>Aug 3rd, 2009</p>
+	<ul>
+		<li>Remove attributes of gradients if they contain default values</li>
+	</ul>
+</section>
+
 <section id="0.17">
 	<header>
 		<h2><a href="#0.17">Version 0.17</a></h2>
diff --git a/scour.inkscape.py b/scour.inkscape.py
new file mode 100755
index 0000000..531dfb4
--- /dev/null
+++ b/scour.inkscape.py
@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+import sys
+from scour import scourString
+input = file(sys.argv[1], "r")
+sys.stdout.write(scourString(input.read()).encode("UTF-8"))
+input.close()
+sys.stdout.close()
diff --git a/scour.inx b/scour.inx
new file mode 100644
index 0000000..30c948c
--- /dev/null
+++ b/scour.inx
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+    <_name>Scoured SVG Output</_name>
+    <id>org.inkscape.output.scour</id>
+    <dependency type="executable" location="extensions">scour.py</dependency>
+    <dependency type="executable" location="extensions">svg_regex.py</dependency>
+    <output>
+        <extension>.svg</extension>
+        <mimetype>image/svg+xml</mimetype>
+        <_filetypename>Scoured SVG (*.svg)</_filetypename>
+        <_filetypetooltip>Scalable Vector Graphics</_filetypetooltip>
+    </output>
+    <script>
+        <command reldir="extensions" interpreter="python">scour.inkscape.py</command>
+    </script>
+</inkscape-extension>
diff --git a/scour.py b/scour.py
index 9939567..01c01a8 100755
--- a/scour.py
+++ b/scour.py
@@ -59,6 +59,7 @@
 #    This would require my own serialization of the DOM objects (not impossible)
 
 # Next Up:
+# - add an option for svgweb compatible markup (no self-closing tags)?
 # - if a <g> has only one element in it, collapse the <g> (ensure transform, etc are carried down)
 # - remove id if it matches the Inkscape-style of IDs (also provide a switch to disable this)
 # - prevent elements from being stripped if they are referenced in a <style> element
@@ -978,6 +979,87 @@ def repairStyle(node, options):
 			
 	return num
 
+def removeDefaultAttributeValues(node, options):
+	num = 0
+	if node.nodeType != 1: return 0
+	
+	# gradientUnits: objectBoundingBox
+	if node.getAttribute('gradientUnits') == 'objectBoundingBox':
+		node.removeAttribute('gradientUnits')
+		num += 1
+		
+	# spreadMethod: pad
+	if node.getAttribute('spreadMethod') == 'pad':
+		node.removeAttribute('spreadMethod')
+		num += 1
+		
+	# x1: 0%
+	if node.getAttribute('x1') != '':
+		x1 = SVGLength(node.getAttribute('x1'))
+		if x1.value == 0:
+			node.removeAttribute('x1')
+			num += 1
+
+	# y1: 0%
+	if node.getAttribute('y1') != '':
+		y1 = SVGLength(node.getAttribute('y1'))
+		if y1.value == 0:
+			node.removeAttribute('y1')
+			num += 1
+
+	# x2: 100%
+	if node.getAttribute('x2') != '':
+		x2 = SVGLength(node.getAttribute('x2'))
+		if (x2.value == 100 and x2.units == Unit.PCT) or (x2.value == 1 and x2.units == Unit.NONE):
+			node.removeAttribute('x2')
+			num += 1
+
+	# y2: 0%
+	if node.getAttribute('y2') != '':
+		y2 = SVGLength(node.getAttribute('y2'))
+		if y2.value == 0:
+			node.removeAttribute('y2')
+			num += 1
+
+	# fx: equal to rx
+	if node.getAttribute('fx') != '':
+		if node.getAttribute('fx') == node.getAttribute('cx'):
+			node.removeAttribute('fx')
+			num += 1
+
+	# fy: equal to ry
+	if node.getAttribute('fy') != '':
+		if node.getAttribute('fy') == node.getAttribute('cy'):
+			node.removeAttribute('fy')
+			num += 1
+
+	# cx: 50%
+	if node.getAttribute('cx') != '':
+		cx = SVGLength(node.getAttribute('cx'))
+		if (cx.value == 50 and cx.units == Unit.PCT) or (cx.value == 0.5 and cx.units == Unit.NONE):
+			node.removeAttribute('cx')
+			num += 1
+
+	# cy: 50%
+	if node.getAttribute('cy') != '':
+		cy = SVGLength(node.getAttribute('cy'))
+		if (cy.value == 50 and cy.units == Unit.PCT) or (cy.value == 0.5 and cy.units == Unit.NONE):
+			node.removeAttribute('cy')
+			num += 1
+
+	# r: 50%
+	if node.getAttribute('r') != '':
+		r = SVGLength(node.getAttribute('r'))
+		if (r.value == 50 and r.units == Unit.PCT) or (r.value == 0.5 and r.units == Unit.NONE):
+			node.removeAttribute('r')
+			num += 1
+
+	# recurse for our child elements
+	for child in node.childNodes :
+		num += removeDefaultAttributeValues(child,options)
+	
+	return num
+
 rgb = re.compile("\\s*rgb\\(\\s*(\\d+)\\s*\\,\\s*(\\d+)\\s*\\,\\s*(\\d+)\\s*\\)\\s*")
 rgbp = re.compile("\\s*rgb\\(\\s*(\\d*\\.?\\d+)\\%\\s*\\,\\s*(\\d*\\.?\\d+)\\%\\s*\\,\\s*(\\d*\\.?\\d+)\\%\\s*\\)\\s*")
 def convertColor(value):
@@ -1839,6 +1921,10 @@ def scourString(in_string, options=None):
 				if elem.getAttribute(attr) != '':
 					elem.setAttribute(attr, scourLength(elem.getAttribute(attr)))
 
+	# remove default values of attributes
+#	print doc.documentElement.toxml()
+	numAttrsRemoved += removeDefaultAttributeValues(doc.documentElement, options)		
+	
 	# convert rasters references to base64-encoded strings 
 	if options.embed_rasters:
 		for elem in doc.documentElement.getElementsByTagNameNS(NS['SVG'], 'image') :
diff --git a/testscour.py b/testscour.py
index 6bef1a3..d6f43d9 100755
--- a/testscour.py
+++ b/testscour.py
@@ -461,8 +461,7 @@ class InheritGradientUnitsUponCollapsing(unittest.TestCase):
 class OverrideGradientUnitsUponCollapsing(unittest.TestCase):
 	def runTest(self):
 		doc = scour.scourXmlFile('unittests/collapse-gradients-gradientUnits.svg')
-		self.assertEquals(doc.getElementsByTagNameNS(SVGNS, 'radialGradient')[0].getAttribute('gradientUnits'), 
-			'objectBoundingBox',
+		self.assertEquals(doc.getElementsByTagNameNS(SVGNS, 'radialGradient')[0].getAttribute('gradientUnits'), '',
 			'gradientUnits not properly overrode when collapsing gradients' )
 
 class DoNotCollapseMultiplyReferencedGradients(unittest.TestCase):
@@ -742,7 +741,73 @@ class RemoveRedundantSvgNamespacePrefix(unittest.TestCase):
 		r = doc.getElementsByTagNameNS(SVGNS, 'rect')[1]
 		self.assertEquals( r.tagName, 'rect',
 			'Redundant svg: prefix not removed')
-		
+
+class RemoveDefaultGradX1Value(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('x1'), '',
+			'x1="0" not removed')
+
+class RemoveDefaultGradY1Value(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('y1'), '',
+			'y1="0" not removed')
+
+class RemoveDefaultGradX2Value(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('x2'), '',
+			'x2="100%" not removed')
+
+class RemoveDefaultGradY2Value(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('y2'), '',
+			'y2="0" not removed')
+
+class RemoveDefaultGradGradientUnitsValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('gradientUnits'), '',
+			'gradientUnits="objectBoundingBox" not removed')
+
+class RemoveDefaultGradSpreadMethodValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		self.assertEquals( g.getAttribute('spreadMethod'), '',
+			'spreadMethod="pad" not removed')
+
+class RemoveDefaultGradCXValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		self.assertEquals( g.getAttribute('cx'), '',
+			'cx="50%" not removed')
+
+class RemoveDefaultGradCYValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		self.assertEquals( g.getAttribute('cy'), '',
+			'cy="50%" not removed')
+
+class RemoveDefaultGradRValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		self.assertEquals( g.getAttribute('r'), '',
+			'r="50%" not removed')
+
+class RemoveDefaultGradFXValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		self.assertEquals( g.getAttribute('fx'), '',
+			'fx matching cx not removed')
+
+class RemoveDefaultGradFYValue(unittest.TestCase):
+	def runTest(self):
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		self.assertEquals( g.getAttribute('fy'), '',
+			'fy matching cy not removed')
+
 # TODO; write a test for embedding rasters
 # TODO: write a test for --disable-embed-rasters
 # TODO: write tests for --keep-editor-data
diff --git a/unittests/gradient-default-attrs.svg b/unittests/gradient-default-attrs.svg
new file mode 100644
index 0000000..9eb569c
--- /dev/null
+++ b/unittests/gradient-default-attrs.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<linearGradient id="g" x1="0" y1='0' x2='100%' y2='0.0' gradientUnits="objectBoundingBox" spreadMethod="pad">
+  <stop offset="0" stop-color="black"/>
+  <stop offset="1" stop-color="white"/>
+</linearGradient>
+<radialGradient id="g2" xlink:href="#g1" cx="50%" cy="0.5" r="50%" fx="50%" fy="0.5"/>
+<rect width="100" height="100" fill="url(#g)"/>
+<rect width="50" height="50" fill="url(#g2)"/>
+</svg>
\ No newline at end of file