I got a weird problem. I didn't knowingly alter the function of Command+Delete but now when I select a file and press Command+Delete instead of sending the file to the Trash, my system asks me my user's password then deletes the file without going through the Trash, like if used rm command from the terminal.
I checked the Preferences but couldn't find a solution. Neither the Finder preferences helped me out.
PS. I am running OS Mountain Lion last version but this form only allows me to choose as high as Leopard for the community.