Weird symbols in emails to BlackBerry clients

Sending PGP/MIME emails to BlackBerry clients may lead to weird symbols in front of given special characters. This is a hard to be solved bug as it has nothing to do with OpenPGP. The OpenPGP messages created with DidiSoft OpenPGP Library for Java and OpenPGP Library for Android are correct and identical when decrypted up to byte array level with those created with other OpenPGP compatible apps including the BlackBerry PGP support.

One of our clients experienced in his Android app this strange behavior when sending encrypted emails to BlackBerry. Digging deeply in this use case we finally resolved the case to be related to a weird expectation in the PGP/MIME format itself, coded in the BlackBerry PGP support.