I found a problem with 
DigitalSignatureAlgorithm>>#initRandomNonInteractively.  It is grabbing 
randomBits from the SoundSystem, but I may not have that installed.  It gave 
me the same bits repeatedly.  I modified 
DigitalSignatureAlgorithm>>#initRandomNonInteractively to not rely on the 
SoundSystem and instead use SecureRandom.  This is published in the 
Cryptography repository.

Rob