I upgraded to Snow Leopard a while ago.
Recently, when I minimize files in any application the files disappear - no icon that I can find, showing how to bring to a dominant window any of the minimized files. I search, can't find, have to re-boot app., and lose data. Not good.
When I minimize files, where do they go, how do I reopen them, and how can I change it so icons for all minimized files remain visible?