dp4 - dupe keys in view_merge result

This may be a regression in ubuntu. Following query is emitting duplicate doc id's in the results:
curl "http://10.3.121.200:8092/default/_design/dev_test_view-c5f7d16/_view/dev_test_view-c5f7d16?full_set=true&connection_timeout=60000&debug=true"

...

{"id":"arch0199-2008_12_25","key":[2008,12,25],"partition":3,"node":"http://10.3.121.188:8092/_view_merge/","value":["employee-199-28b3a87","199@couchbase.com"]}

,

{"id":"arch0199-2008_12_25","key":[2008,12,25],"partition":3,"node":"local","value":["employee-199-28b3a87","199@couchbase.com"]}

,

full logs attached