Mx_internal_uid problem with advanced datagrid

Question

I have a XML structure like this:
<Projekti ...attributes>
<Tehtava ....attributes />
<Tehtava ...attributes />
</Projekti>
<Projekti...>
...etc
And I'm populating advanced datagrid with this hierarchial
data, so I can get a tree view in datagrid where there is Projekti
-nodes and inside them is the Tehtava-nodes.
Problem:
When I bind the XML, and the hierarchialdata (that is created
from the XML) flex automatically adds
<mx_internal_uid>a324235351514......</mx_internal_uid>
-nodes inside of the Projekti-nodes. And this causes empty folders
added in a tree view when user clicks them.
Is there a simple way to:
a) prevent thos uid-nodes being created?
b) filter thos <mx_internal_uid>-nodes out from the
dataprovider of the advanced datagrid?

Answer 1

I know this is way after-the-fact, but I just ran into this problem myself today. I found that it generated the mx_internal_uid if the node I was selecting was an XMLList instead of XML. A simple cast fixed the problem.
P.S. "And this causes empty folders added into a tree view when user clicks on them." makes perfect sense when you're using the XML inside a <mx:Tree>. As soon as you select the item (whether by clicking or programmatically), you get extra nodes in the tree.