| http://www.w3.org/ns/prov#value | - Not having IE7 right now (wrong machine), I still looked and while it may be something stupid we are both overlooking that seems unrelated, two ideas come to mind:The rel-po would box4 is not a direct ancestor, and I have seen IE get confused with actual positions when a grandparent is the nearest positioned ancestor and a grandchild is abso-po'd.
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