Upon being prompted by the system that an upgrade is available and do I wish to upgrade, I proceded as usual. Then, I verified the integrity of the system via the 3 methods described on :
https://tails.boum.org/install/download/index.en.html
1 - Firefox Tails verification Extension
2 - Open PGP
3 - Command Line
All gave me " Bad or forged Signature " data compromised ...
I then ran a md5sum && sha256sum for good measure, No match.
I send a bug report via the integrated whisper back feature ( in the compromised system yesterday : / ) it may or may not have gotten through to the devs.
I sent one today using another uncompromised version of an older release.
Takeaway ; verify your checksums and please someone look into this.
Since it happened on 2 networks and 2 systems, this might be a compromised mirror site serving that to many users.
Eastern Canada.