Deploy error on signer information not matching

[metasoarous]

First I had issues with #62, so I tried using the update-clojure-jclouds branch, as suggested. That resolved the issue with #62, but now I'm getting stuck at the following step:

...
ERROR compute - << problem customizing node(us-west-2/i-531b885e):
org.jclouds.ssh.SshException:
(ubuntu:rsa[fingerprint(<... cut for brevity...> )])
error acquiring {hostAndPort=<cut>, loginUser=ubuntu, ssh=null, connectTimeout=60000,
sessionTimeout=60000} (not retryable): class "org.bouncycastle.crypto.prng.VMPCRandomGenerator"'s signer
information does not match signer information of other classes in the same package
        at org.jclouds.sshj.SshjSshClient.propagate(SshjSshClient.java:381)
        at org.jclouds.sshj.SshjSshClient.acquire(SshjSshClient.java:211)
        at org.jclouds.sshj.SshjSshClient.connect(SshjSshClient.java:221)
        ...

It seems as though maybe I don't have my rsa keys set up properly, or some such. But I can't figure out what would actually be wrong there (I did create a key pair, point to the correct locations in ~/.pallet/config.clj and loaded the public key onto AWS. Is there anything I'm missing? Or is this perhaps a bug?