replication failing for replica=2 with 3 nodes

1.6.0beta4rc1-16
centos 5.4 32 bit

1) create a 3 node cluster with the default bucket having a replica count of 2
2) verify vbucketmigrator is properly replicating every vbucket twice
3) load keys into default bucket
4) verify all keys are accessible
5) shutdown northscale-server on node3 (service northscale-server stop)
6) failover node3
7) verify all vbuckets have 1 active
8) verify all keys are accessible
at this point I was missing about 1/4 of my keys

Basically I verified that the vbucketmap was correct, vbucketmigrator processes had the correct command line and we had 1 active for each vbucket after the failover.