couchbase-cli broken in build 786, getting: ImportError: No module named json

python 2.4
CentOS release 5.8 (Final)
2.0.2 Build 786

0). stopped cb service: /etc/init.d/couchbase-server stop
1). removed previous installation of couchbase: rpm -e couchbase-server-2.0.2-779
2). installed new rpm: rpm -i couchbase-server-enterprise_x86_64_2.0.2-786-rel.rpm
3). invoked: couchbase-cli

[root@cen-1910 bin]# pwd
/opt/couchbase/bin

[root@cen-1910 bin]# ./couchbase-cli
Traceback (most recent call last):
File "/opt/couchbase/lib/python/couchbase-cli", line 13, in ?
import node
File "/opt/couchbase/lib/python/node.py", line 8, in ?
import util_cli as util
File "/opt/couchbase/lib/python/util_cli.py", line 4, in ?
import json
ImportError: No module named json
[root@cen-1910 bin]# rpm -qa|grep couchbase
couchbase-server-2.0.2-786
[root@cen-1910 bin]# uname -a
Linux cen-1910 2.6.18-308.el5 #1 SMP Tue Feb 21 20:06:06 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@cen-1910 bin]# pwd
/opt/couchbase/bin
[root@cen-1910 bin]# ./couchbase-cli server-list -c 10.1.3.106:8091 -u Administrator -p couchbase
Traceback (most recent call last):
File "/opt/couchbase/lib/python/couchbase-cli", line 13, in ?
import node
File "/opt/couchbase/lib/python/node.py", line 8, in ?
import util_cli as util
File "/opt/couchbase/lib/python/util_cli.py", line 4, in ?
import json
ImportError: No module named json
[root@cen-1910 bin]#