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[qbproger]

I was altering the scenegraph during a traversal, and was getting exceptions because I was detaching children from their parents.  Changing it to start at numChildren-1 and while it's >= 0 fixed the problem because now when I detach it doesn't change the numbering of the other nodes.

There may be a way to keep the current traversal order and be able to alter the scenegraph, but this was fine for my needs.

qb