I don't mind this feature, I just don't like that the OS doesn't provide a way to turn it off! Or at LEAST to turn it off after the first time you open a program (I'm getting it every time). Very un-apple of them to not let you customize this.

I think this "feature" is buggy.

When I build a machine, I download and install all the apps from my own file server, using my own login. When I subsequently log in as another user and run the apps I am constantly annoyed with the "do you want to open this?" pop-up. And the only way to get rid of it is to download the app as this other user and install them. Then I only get asked once and never again. If I log back in as myself, no warning. Soo... they don't want me to download & install from a file server? Yet another reason I think Leopard is junk.