Sometimes when I switch through programs using the Command+Tab shortcut certain programs appear to be greyed out. I can switch to the program in question with no problems nor is there anything happening with the program to indicate why it would be greyed out.
I'm just curious as to what it means...
(its a little heard to tell due to me having to screen capture with my phone :p but the quicktime icon is greyed out)

I'm running Snow Leopard 10.6.8

