THIS is why the contract-based document constructors need to die

They make it way too easy to create an improperly initialized document 
in the wrong place (non-main thread in this guy's case) and shoot 
yourself in the foot with it....

-------- Original Message --------
Subject: DOM operation in thread?
Date: Thu, 13 Aug 2009 02:37:40 -0700 (PDT)
From: DDD <[email protected]>
Organization: http://groups.google.com
Newsgroups: mozilla.dev.tech.xpcom

Hi,
I met a special question.
The following statements are in a thread. Sometimes it will crash
here.
         ...
	nsCOMPtr<nsIDOMDocument> doc = nsnull;
	doc = do_CreateInstance("@mozilla.org/xul/xul-document;1");

	nsCOMPtr<nsIDOMText> messageText = nsnull;

         nsString wStrMessage;

	rv = doc->CreateTextNode(wStrMessage, getter_AddRefs(messageText));

	nsCOMPtr<nsIDOMSerializer> serialize = nsnull;
	serialize = do_CreateInstance("@mozilla.org/xmlextras/xmlserializer;
1");

	nsString xmlStr;
	rv = serialize->SerializeToString(messageText, xmlStr);
         ...

And here I just wanna convert some special character like <, > to &lt;
&gt; etc.
These dom operations will not affect any GUI DOM.

Any suggestions?
Thank you in advance.