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Windows Update KB947864 Seems to Foil Some Behaviors
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Bill Burcham  
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  More options 17 Apr, 00:35
From: Bill Burcham <bill.burc...@gmail.com>
Date: Wed, 16 Apr 2008 16:35:52 -0700 (PDT)
Local: Thurs 17 Apr 2008 00:35
Subject: Windows Update KB947864 Seems to Foil Some Behaviors
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On a Win XP VM (Parallels) running IE7 some of my behaviors stopped
being triggered (but others are still working) after installing
Windows Update KB947864 (released a few days ago).

Symptom:

QueryObserver (behavior) has an onclick. I register that behavior on
an anchor via Event.addBehavior "a.queryButton": QueryObserver. But
when clicked, the behavior is not delegated to. Instead (apparently)
the default behavior of the link is executed, which in my Rails log
looks like this:

Apr 16 12:20:50 app1 rails[7056]: ActionController::RoutingError (No
route matches "/://javascript:void(0)" with {:method=>:get}):

So it looks like when the link (which had an empty href in the static
HTML) is clicked, the behavior is not called but instead this link
with the no-op bookmarklet is fetched instead. It's so wierd. I mean,
isn't the default behavior of an anchor w/ a javascript bookmarklet to
_execute_ when clicked?

Are you having odd issues w/ your Lowpro app on IE6/7 on XP/Vista in
the last few days?


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Bill Burcham  
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  More options 17 Apr, 01:07
From: Bill Burcham <bill.burc...@gmail.com>
Date: Wed, 16 Apr 2008 17:07:34 -0700 (PDT)
Local: Thurs 17 Apr 2008 01:07
Subject: Re: Windows Update KB947864 Seems to Foil Some Behaviors
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So did a big "duh" and double-clicked the nifty "yield" sign in the
lower left chrome and I see there is a JavaScript error on the page.
Something like this:

line 3187
char 29
Error: 'undefined' is null or not an object
Code: 0

Looking at my (Rails-generated) "all.js" in Firebug (in Firefox), line
3187 appears to be:

3184 attrPresence: function(nodes, root, attr) {
3185 var results = [];
3186 for (var i = 0, node; node = nodes[i]; i++)
3187 if (Element.hasAttribute(node, attr)) results.push(node);
3188 return results;
3189 }

which is part of the Selector class (in Prototype).


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Bill Burcham  
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  More options 17 Apr, 14:53
From: Bill Burcham <bill.burc...@gmail.com>
Date: Thu, 17 Apr 2008 06:53:19 -0700 (PDT)
Local: Thurs 17 Apr 2008 14:53
Subject: Re: Windows Update KB947864 Seems to Foil Some Behaviors
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This turned out to have nothing to do with Lowpro and everything to do
w/ Prototype 1.6.0_rc0.  Some attribute selectors fail in that version
of Prototype in the presence of KB947864.

This example works fine w/ Prototype 1.6.0.2 but if you run it w/
1.6.0_rc0 you see no alert (popups):

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/
TR/html4/stric...">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Test</title>
<script type="text/javascript" src="prototype.js"></script>
<script>
  Event.observe(window, 'load', function(){

  var sel = $('select1').down('[selected]');
  alert("attr selector doesn't crash when attr present");

  sel = $('select2').down('[selected]');
  alert("attr selector doesn't crash when attr NOT present");
  });
</script>
</head>
<body>
   <form method="get" action="/">
      <select id="select1" name="foo">
         <option value="bricks" selected>bricks</option>
      </select>

      <select id="select2" name="bar">
         <option value="boards">boards</option>
      </select>
   </form>
</body>
</html>


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Bill Burcham  
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  More options 17 Apr, 14:56
From: Bill Burcham <bill.burc...@gmail.com>
Date: Thu, 17 Apr 2008 06:56:54 -0700 (PDT)
Local: Thurs 17 Apr 2008 14:56
Subject: Re: Windows Update KB947864 Seems to Foil Some Behaviors
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Prototype 1.6.0.1 (the version shipping in Rails 2.0.2 gem) looks
immune too.

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