rebalance exited with timeout

Install couchbase server 2.0.0-1525 on 10 nodes cluster.
Load 45 million items to default bucket with delete, mutate and expire.
Create 2 views
Let the load running about 6K ops
Remove node 25 and failover node 24.
Rebalance.
Rebalance failed with reason

2012-08-02 10:42:32.570 ns_vbucket_mover:0:critical:message(ns_1@10.3.121.13) - <0.22280.84> exited with {exited,
{'EXIT',<0.22368.84>,
{timeout,
{gen_server,call,
[

{'ns_memcached-default','ns_1@10.3.121.20'},
{stats,<<"tap">>},
60000]}}}}
2012-08-02 10:43:01.365 ns_orchestrator:2:info:message(ns_1@10.3.121.13) - Rebalance exited with reason {exited,
{'EXIT',<0.22368.84>,
{timeout,
{gen_server,call,
[{'ns_memcached-default','ns_1@10.3.121.20'}

,

{stats,<<"tap">>}

,
60000]}}}}

Here is the link to diags
https://s3.amazonaws.com/packages.couchbase/diag-logs/large_cluster_2_0/10nodes-1525-rebalance-timeout-20120802.tgz