While the headline makes it sound like they've cracked PGP encryption, the story suggests that they may have just discovered the keys that were being stored on the server:
"The Dutch authorities also discovered that the 'keys' for the PGP encryption system were generated by the server, rather than by the device. As a result, the Dutch authorities came to believe that the keys to decrypt the PGP encrypted information, on the Ennetcom PGP BlackBerry devices, are stored on Ennetcom's BlackBerry Enterprise Servers."
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[ 2.3 ms ] story [ 7.9 ms ] thread"The Dutch authorities also discovered that the 'keys' for the PGP encryption system were generated by the server, rather than by the device. As a result, the Dutch authorities came to believe that the keys to decrypt the PGP encrypted information, on the Ennetcom PGP BlackBerry devices, are stored on Ennetcom's BlackBerry Enterprise Servers."