The software is not from a trusted source ???

[Joe Zeff]

On 01/03/2012 05:35 AM, Alexander Volovics wrote:
> I was just rather surprised to see this message and would like to know
> if packagekit is getting "more sophisticated" or there was some slight
> problem with one of the packages (unsigned?)

There's a known issue at rpmfusion: some of the packages haven't been 
updated to the latest key yet.  You need to turn off gpg-key checking 
either as an option in yumex or on the command line with yum to get 
around this.