Trying to insert a TimeUUID via Java/Thrift -- "UUIDs must be exactly 16 bytes"

[Sean Bowman]

I'm at my wits end with Cassandra; is 0.6.4 just broken?  I've created a very 
simple keyspace:

<Keyspace Name="MyApp">
 <ColumnFamily Name="History" CompareWith="TimeUUIDType"/>

Using the Thrift sample code for 0.6 on the wiki, and the FAQ about TimeUUID's 
and Java, I tried to generate a GUID using this method:

        String key = new com.eaio.uuid.UUID().toString()

Since all the Thrift get and insert statements use Strings for the keys.  But 
when I send one of these GUID's, I get:

        Exception in thread "main" InvalidRequestException(why:UUIDs must be 
exactly 16 bytes)
                at 
org.apache.cassandra.thrift.Cassandra$insert_result.read(Cassandra.java:12295)
                at 
org.apache.cassandra.thrift.Cassandra$Client.recv_insert(Cassandra.java:675)
                at 
org.apache.cassandra.thrift.Cassandra$Client.insert(Cassandra.java:648)

I even tried something like:

        client.insert(keyspace, new String(asByteArray(getTimeUUID()), path, 
"Some value".getBytes("UTF-8"), timestamp, ConsistencyLevel.ONE);

Can anyone point me in the direction of how I send a time-based UUID to 
Cassandra 0.6.4 through the Java Thrift client?  Or am I missing the point of 
all of this somehow?