That could be the problem. I hear that raw formats may not be handled 100% accurate. I assume that saving in a different format, a CS5 native, could restore image icons.
BTW, if only dng files have this unusual behavior, my guess about raw could be right.

Last edited by macnerd10; 06/10/11 09:56 PM.
Alex
3.1 GHz 13" MacBook Pro 2015, 8 GB RAM, OS 10.11.2, Office 2011, TimeWarner Cable
2.8 GHz Xeon Mac Pro 2010, 16 GB RAM, OS 10.11.2, Office 2011, LAN