Leopard... Should have the latest updates... About half the icons in my desktop appear to be frozen (including the 'Macintosh HD' icon, a couple of folders, a powerpoint file, and a TeX file). The other half seem to be okay. The ones that are frozen can't be moved or opened. The computer seems to treat them as background with respect to right clicking on them. I can open them if I go through the finder... Any thoughts?