A user had trouble loading this file in Autodesk Design Review. As a test, I
tried it in Freewheel. It worked:
Please review the design found at:
http://freewheel.autodesk.com/email.aspx?path=ADSKFW%3a%2f%2f06%5cd2%5cce%5cb8%5c96%5cdf%5ce6%5c21%5c6a%5c5c%5c35%5cb9%5c7f%5c48%5cf2%5c6a%5ccf%5cc3%5c2d%5c5e%5cSky+6+1st+Floor.dwf&sec=1&cx=0.9309895833333334&cy=0.5009743875278396&scale=8
Notice that he created his markups using Autodesk Design Review but can
share the resulting DWF file with Freewheel.