Standards Display: IE 6 - Text Missing in Edit Mode

1. Go to any standards in IE 6 http://current.dev.curriki.org/xwiki/bin/view/Coll_ShermanTank/EmbedTest?bc=&viewer=standards
2. Drill down to the node level

Bug
Instruction text is missing.

Maybe a Z level problem? Because if you roll over where the text should be and select to cut and past it, it appears.