On Saturday 09 of May 2015 10:25:04 Lisi Reisz wrote:
> From a request for help I received this morning:
> <quote>
> I wanted to do a clean install of Trinity on a new disk, and I got this
> error when trying to add the key.
> gpg: requesting key A04BE668 from hkp server pks.gpg.cz
> gpgkeys: key A04BE668 can't be retrieved
> gpg: no valid OpenPGP data found.
> </quote>
>
> Any ideas?
> Lisi
>

It seems that pks.gpg.cz has a problem - it returns 500 Internal Server Error. 
You can use another public keyserver - for example keys.gnupg.net

-- 
Slávek