I have been running Elements 6 on Snow Leopard for 6 years without problem. I upgraded to Mavericks OS and although PSE6 works ok, when I save the file there is about 30percent chance that there will be no thumbnail for the file, just a generic icon. I thought this might be resolved if I used PSE12 but it is just the same. If I drag the file to the desktop the thumbnail appears but if I drag it back it disappears. Other image editors (GIMP, Graphic Converter) have no problem. Any suggestions as to why this might be happening? I have two new iMac 27 running Mavericks and the problem is the same in both.