[kevkrom]

On this linux (Fedora Core 11) box I'm running on, the option is grayed out.

I strongly disagree with the implication that this is a security issue, however, as the system is set up (by default) to have "root" check for package updates (including installed third-party packages packages, such as Firefox). It's the main reason to stick with installing via "yum" rather than downloading and compiling on your own -- automated package control.

[kevkrom]

And, may I add, the idea that a non-admin user should be able to modify a software package on a multi-user operating system is patently crazy. Sometimes there's a darn good reason for deferring software upgrades, even security updates, and non-admin users shouldn't have the ability to override admin decisions like that.