Well, this is new.
On a apt-get upgrade:

W: The repository
'http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-builddeps-r14.0.x
  xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore
    potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user
    configuration details.
W: The repository
 'http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-r14.0.x
   xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore
    potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user
    configuration details.


Ubuntu 16.04 using Trinity 14.07 with Preliminary Stable build.

Jonesy
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