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checkboxes hidden on tree

Please reference this image:
http://tinypic.com/view.php?pic=2u9h5e8&s=4

Checkboxes are not being shown. But when clicking an item, it shows.

Here is the code being used.

categories_tree = new dhtmlXTreeObject(document.getElementById('categories_tree_div'),"80%","100%",0);
categories_tree.setImagePath("/some/image/path/");categories_tree.enableCheckBoxes(true);categories_tree.attachEvent("onClick",onNodeSelect);function onNodeSelect(nodeId) { categories_tree.setCheck(nodeId,!categories_tree.isItemChecked(nodeId)); }categories_tree.attachEvent("onCheck","onCheck");
function onCheck(nodeId) {
document.getElementById('categories').value = categories_tree.getAllChecked();
}categories_tree.attachEvent("onXLE",onXLE);function onXLE() {document.getElementById('categories').value = categories_tree.getAllChecked();
}categories_tree.loadXML("./xml.php")

In which browser isssue occurs for you.

There is known issues with checkbox rendering in Google Chrome and Safari 3.1 , if it is your case - please contact us directly at support@dhtmlx.com - we will send you an updated version. 

If issue occurs in IE - please try to add next line to the init code 
        tree.enableIEImageFix();
it will resolve issue if it is caused by problems with IE image cache.

It is in latest version of firefox

I have emailed you thanks.  I am a PRO owner.

I updated the file (it was the same size as our current one) and it did not help.  Using latest version of firefox.

Issue can't be reconstructed locally ( please check attached sample )
If issue still occur for you - please provide any kind of sample where issue
can be reconstructed. 

Is the dhtmlx tree file in here the PRO version?  This one works, but we need the pro version.

Also I can't compare the dhtmlx common file to ours, as ours is compressed.

Please re-send these files to us.

These are our includes....

<link rel="stylesheet" type="text/css" href="./dhtmlx/css/dhtmlXTree.css" />
<script type="text/javascript" src="./dhtmlx/dhtmlxcommon.js"></script>
<script type="text/javascript" src="./dhtmlx/dhtmlxtree.js"></script>
<script type="text/javascript" src="./dhtmlx/dhtmlxtree_xw.js"></script>

The problem was an image file.  In older versions iconUncheckAll.gif used to be named iconUnCheckAll.gif with the "C" capitalized.  I renamed this image now checkboxes show.