couchdb $.couch.db.save Error

gistfile1.erl

[debug] [<0.1228.0>] 'PUT' /categorization/9aef603131112c1f3aba4efb090031cb {1,
                                                                             1} from "127.0.0.1"
Headers: [{'Accept',"application/json, text/javascript, */*; q=0.01"},
          {'Accept-Charset',"ISO-8859-1,utf-8;q=0.7,*;q=0.3"},
          {'Accept-Encoding',"gzip,deflate,sdch"},
          {'Accept-Language',"en-GB,en-US;q=0.8,en;q=0.6"},
          {'Connection',"keep-alive"},
          {'Content-Length',"417"},
          {'Content-Type',"application/json"},
          {'Host',"127.0.0.1:5984"},
          {"Origin","http://127.0.0.1:5984"},
          {'Referer',"http://127.0.0.1:5984/"},
          {'User-Agent',"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Ubuntu/12.04 Chromium/18.0.1025.168 Chrome/18.0.1025.168 Safari/535.19"},
          {"x-couchdb-requested-path",
           "/categorization/_design/mrci/_rewrite/api/9aef603131112c1f3aba4efb090031cb"},
          {"x-couchdb-vhost-path","/api/9aef603131112c1f3aba4efb090031cb"},
          {"X-Requested-With","XMLHttpRequest"}]
[error] [<0.1228.0>] function_clause error in HTTP request
[info] [<0.1228.0>] Stacktrace: [{base64,decode,
                                  [undefined],
                                  [{file,"base64.erl"},{line,113}]},
                                 {couch_doc,'-transfer_fields/2-fun-0-',1,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_doc.erl"},
                                   {line,252}]},
                                 {lists,map,2,
                                  [{file,"lists.erl"},{line,1173}]},
                                 {couch_doc,transfer_fields,2,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_doc.erl"},
                                   {line,225}]},
                                 {couch_httpd_db,couch_doc_from_req,3,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_httpd_db.erl"},
                                   {line,968}]},
                                 {couch_httpd_db,db_doc_req,3,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_httpd_db.erl"},
                                   {line,776}]},
                                 {couch_httpd_db,do_db_req,2,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_httpd_db.erl"},
                                   {line,230}]},
                                 {couch_httpd,handle_request_int,5,
                                  [{file,
                                    "/media/secrets/couchdb/dependencies/couchdb/src/couchdb/couch_httpd.erl"},
                                   {line,317}]}]
[error] [<0.1228.0>] Uncaught server error: function_clause
[info] [<0.1228.0>] 127.0.0.1 - - PUT /categorization/9aef603131112c1f3aba4efb090031cb 500
[debug] [<0.1228.0>] httpd 500 error response:
 {"error":"unknown_error","reason":"function_clause"}

working futon log

[debug] [<0.5148.0>] 'PUT' /categorization/9aef603131112c1f3aba4efb090031cb {1,
1} from "127.0.0.1"
Headers: [{'Accept',"application/json, text/javascript, /; q=0.01"},
{'Accept-Charset',"ISO-8859-1,utf-8;q=0.7,*;q=0.3"},
{'Accept-Encoding',"gzip,deflate,sdch"},
{'Accept-Language',"en-GB,en-US;q=0.8,en;q=0.6"},
{'Connection',"keep-alive"},
{'Content-Length',"329"},
{'Content-Type',"application/json"},
{'Cookie',"AuthSession="},
{'Host',"localhost:5984"},
{"Origin","http://localhost:5984"},
{'Referer',"http://localhost:5984/_utils/document.html?categorization/9aef603131112c1f3aba4efb090031cb"},
{'User-Agent',"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Ubuntu/12.04 Chromium/18.0.1025.168 Chrome/18.0.1025.168 Safari/535.19"},
{"X-Requested-With","XMLHttpRequest"}]
[debug] [<0.5148.0>] OAuth Params: []
[info] [<0.5148.0>] 127.0.0.1 - - PUT /categorization/9aef603131112c1f3aba4efb090031cb 201