Client.get() returns null values when using CouchbaseConnectionFactoryBuilder

Java client 1.1-dp seems to have a problem using CouchbaseConnectionFactoryBuilder. Client.get() returns null values regardless of whether a key exists or not. Java client 1.0.3 doesn't have the problem.

With 1.1-dp, if I set up a client like so:

URI base = new URI(String.format("http://%s:8091/pools", server));
List<URI> baseURIs = new ArrayList<URI>();
baseURIs.add(base);
CouchbaseConnectionFactoryBuilder cfb = new CouchbaseConnectionFactoryBuilder();
cfb.setOpTimeout(10000);
cfb.setOpQueueMaxBlockTime(10000);
CouchbaseConnectionFactory cf = cfb.buildCouchbaseConnection(baseURIs, bucket, "", "");
CouchbaseClient client = new CouchbaseClient(cf);

then try to get a key like so:

getFuture = client.asyncGet(key);
value = (String) getFuture.get(); // value is null

the .get() doesn't fail but the returned value is null.

However, if I set up the 1.1-dp client like so, using just CouchbaseConnectionFactory:

URI base = new URI(String.format("http://%s:8091/pools", server));
List<URI> baseURIs = new ArrayList<URI>();
baseURIs.add(base);
CouchbaseConnectionFactory cf = new CouchbaseConnectionFactory(baseURIs, bucket, "");
CouchbaseClient client = new CouchbaseClient(cf);
getFuture = client.asyncGet(key);
value = (String) getFuture.get(); // value is not null and contains the document for the key

I want to use CouchbaseConnectionFactoryBuilder because I'm doing a bulk import of millions of documents and I need the timeout/blocking behaviour to prevent swamping the client.

Java client 1.0.3 works correctly - using CouchbaseConnectionFactoryBuilder to build connection factories and clients results in the correct behaviour.