It just displays a black screen. Turning transparency on will show the desktop while still protecting from input. For Version for older MacOS X version suchs as 10.4 "Tiger" or 10.5 "Leopard" please visit http://www.wurst-wasser.net/cgi-bin/wurst-wasser.net/wiki.pl?SoftwareProjectsOverview#Blank_Screen_Saver
What's new in this version:
Snow Leopard (MacOS X 10.6) support
