Half a year ago we have released version 188.8.131.52 which addressed compatibility with OpenPGP signatures verification with systems build with Java version 7 and above.
Unfortunately it ended that we have introduced an additional bug at that time that brakes signature verification for each 1 out of 500 files created with RSA key and SHA-1 hash digest.
The newest version 184.108.40.206 of OpenPGP Library for .NET finally resolves this issue. Our customers are strongly recommended to update, in order to exchange without any hassle data with OpenPGP systems build and running on Java 7 or above.
Known affected systems so far: Tibco MFT, iWay Integration Services.