Nautilus File Manager goes blank after an amount of time
At power up, I open the file manager Nautilus, then I minimize the manager's window. Coming back to it, minutes (30? 20? 10 minutes later I'm uncertain exactly how long) shows the outline of the window. But all the icons are gone. I then must close that windows and open Nautilus again, in order to see the files/objects/sub-directories, et cetera.
See attached screenshot, please.
AMD Athlon II X4 620, 4gig ddr2-800, m/b MSI K9N6PGM2, 1T SATA, EVGA 9500GT, Brother MFC-240C prntr, LG DVD-rom GSA-H55N