Und die nächste:
We have found a partial decrypt of 101 letters long FTNBK message (listed as previously unbroken here: http://cryptocellar.org/bgac/GArmy_July1941.html)
There were a couple of more or less garbled partial decrypts received by the server but it was not noticed until a better solution was found, which is:
Replacing A with O in the 19th group MJKAZ->MJKOZ (http://cryptocellar.org/bgac/16071941_214.pdf ) changes the signature to mathiatvmathiat. It's possible that the plugboard connections are not 100% correct because the message is still garbled, but so far I was unable to find better solution.
I have sent info to Frode Weierud who has already confirmed that the message is broken and I hope that he will post more info soon