diff --git a/library/HTMLPurifier/AttrDef/Pixels.php b/library/HTMLPurifier/AttrDef/Pixels.php
new file mode 100644
index 00000000..4c04a855
--- /dev/null
+++ b/library/HTMLPurifier/AttrDef/Pixels.php
@@ -0,0 +1,30 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDef.php';
+
+class HTMLPurifier_AttrDef_Pixels extends HTMLPurifier_AttrDef
+{
+    
+    function validate($string) {
+        
+        $string = trim($string);
+        if ($string === '0') return $string;
+        if ($string === '')  return false;
+        $length = strlen($string);
+        if (substr($string, $length - 2) == 'px') {
+            $string = substr($string, 0, $length - 2);
+        }
+        if (!is_numeric($string)) return false;
+        $int = (int) $string;
+        
+        if ($int < 0) return '0';
+        
+        // could use some upper-bound checking
+        
+        return (string) $int;
+        
+    }
+    
+}
+
+?>
\ No newline at end of file
diff --git a/library/HTMLPurifier/Config.php b/library/HTMLPurifier/Config.php
index 5ead680b..a94b2b56 100644
--- a/library/HTMLPurifier/Config.php
+++ b/library/HTMLPurifier/Config.php
@@ -35,6 +35,10 @@ class HTMLPurifier_Config
     // at all.
     var $attr_lang_alpha = false;
     
+    // max amount of pixels allowed to be specified
+    var $attr_pixels_hmax = 600;  // horizontal context
+    var $attr_pixels_vmax = 1200; // vertical context
+    
     function createDefault() {
         $config = new HTMLPurifier_Config();
         return $config;
diff --git a/library/HTMLPurifier/Definition.php b/library/HTMLPurifier/Definition.php
index 964bc672..0fe46332 100644
--- a/library/HTMLPurifier/Definition.php
+++ b/library/HTMLPurifier/Definition.php
@@ -6,6 +6,7 @@ require_once 'HTMLPurifier/AttrDef.php';
     require_once 'HTMLPurifier/AttrDef/Class.php';
     require_once 'HTMLPurifier/AttrDef/Text.php';
     require_once 'HTMLPurifier/AttrDef/Lang.php';
+    require_once 'HTMLPurifier/AttrDef/Pixels.php';
 require_once 'HTMLPurifier/AttrTransform.php';
     require_once 'HTMLPurifier/AttrTransform/Lang.php';
     require_once 'HTMLPurifier/AttrTransform/TextAlign.php';
@@ -296,6 +297,8 @@ class HTMLPurifier_Definition
         $this->info['table']->attr['rules'] = $e_TRules;
         $this->info['table']->attr['summary'] = $e_Text;
         
+        $this->info['table']->attr['border'] = new HTMLPurifier_AttrDef_Pixels();
+        
         //////////////////////////////////////////////////////////////////////
         // UNIMP : info_tag_transform : transformations of tags
         
diff --git a/tests/HTMLPurifier/AttrDef/PixelsTest.php b/tests/HTMLPurifier/AttrDef/PixelsTest.php
new file mode 100644
index 00000000..ad62235b
--- /dev/null
+++ b/tests/HTMLPurifier/AttrDef/PixelsTest.php
@@ -0,0 +1,39 @@
+<?php
+
+require_once 'HTMLPurifier/AttrDefHarness.php';
+require_once 'HTMLPurifier/AttrDef/Pixels.php';
+
+class HTMLPurifier_AttrDef_PixelsTest extends HTMLPurifier_AttrDefHarness
+{
+    
+    function test() {
+        
+        $this->def = new HTMLPurifier_AttrDef_Pixels();
+        
+        $this->assertDef('1');
+        $this->assertDef('0');
+        
+        $this->assertDef('2px', '2'); // rm px suffix
+        
+        $this->assertDef('dfs', false); // totally invalid value
+        
+        // conceivably we could repair this value, but we won't for now
+        $this->assertDef('9in', false);
+        
+        // test trim
+        $this->assertDef(' 45 ', '45');
+        
+        // no negatives
+        $this->assertDef('-2', '0');
+        
+        // remove empty
+        $this->assertDef('', false);
+        
+        // round down
+        $this->assertDef('4.9', '4');
+        
+    }
+    
+}
+
+?>
\ No newline at end of file
diff --git a/tests/HTMLPurifier/Strategy/ValidateAttributesTest.php b/tests/HTMLPurifier/Strategy/ValidateAttributesTest.php
index 6adbb66e..17d6ba08 100644
--- a/tests/HTMLPurifier/Strategy/ValidateAttributesTest.php
+++ b/tests/HTMLPurifier/Strategy/ValidateAttributesTest.php
@@ -69,7 +69,7 @@ class HTMLPurifier_Strategy_ValidateAttributesTest extends
         
         // test table
         $inputs[13] = <<<HTML
-<table frame="above" rules="rows" summary="A test table">
+<table frame="above" rules="rows" summary="A test table" border="2">
     <tr valign="top">
         <th abbr="super" align="left">Supercalifragilistic</th>
     </tr>
diff --git a/tests/index.php b/tests/index.php
index 6b5580cb..a7ee1e2b 100644
--- a/tests/index.php
+++ b/tests/index.php
@@ -43,11 +43,13 @@ $test_files[] = 'AttrDef/IDTest.php';
 $test_files[] = 'AttrDef/ClassTest.php';
 $test_files[] = 'AttrDef/TextTest.php';
 $test_files[] = 'AttrDef/LangTest.php';
+$test_files[] = 'AttrDef/PixelsTest.php';
 $test_files[] = 'IDAccumulatorTest.php';
 $test_files[] = 'TagTransformTest.php';
 $test_files[] = 'AttrTransform/LangTest.php';
 $test_files[] = 'AttrTransform/TextAlignTest.php';
 
+
 $test_file_lookup = array_flip($test_files);
 
 if (isset($_GET['file']) && isset($test_file_lookup[$_GET['file']])) {