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#4
10-10-2013, 11:23 AM
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Sorry, I cannot duplicate this. I assuming you haven't added anything to the files while opened in 2010 that Project 2007 doesn't recognize (inactive tasks, manually scheduled tasks).
On a copy of the file, open in 2010, Save AS XML and try opening in 2007. It is possible that repeated back and forth passings has caused some corruption. 
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Windows 7 64bit 
Office 2010 32bit
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