jquery $.postMessage is not a function
<p>I have a site that is loading several versions of jQuery.
Will that possibly cause the "is not a function" error?</p>

<pre><code> TypeError: $.postMessage is not a function
.postMessage( { if_height: $('body').outerHeight( true ) }, parent_url, parent )
</code></pre>

<p>I know that I should not load several versions but in this case I have no choice.</p>

<p>edit:
This is what is getting loaded (and order)...</p>

<pre><code>http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js
https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js
my.js (contains jQuery 1.7.2 and the jQuery postMessage plugin, http://benalman.com/projects/jquery-postmessage-plugin/)
https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
</code></pre>

<p>...this is such a mess haha.. sometimes you just want to shoot bad devs ;)</p>
