Weirdness when deleting CouchDB replication document

gistfile1.sh

$ curl http://127.0.0.1:5984/
{"couchdb":"Welcome","uuid":"39ca13ed778fa8a6376ed7affee79b06","version":"1.3.0","vendor":{"version":"1.3.0","name":"The Apache Software Foundation"}}


$ curl http://127.0.0.1:5984/_replicator/mygpo_categories
{"_id":"mygpo_categories","_rev":"5-35ceab198cf3edc63865dcb081551ae8","source":"mygpo","target":"http://127.0.0.1:5984/mygpo_categories","create_target":true,"user_ctx":{"name":"stefan","roles":["admin"]},"filter":"generic/is_type","query_params":{"doc_type":"Category"},"owner":"stefan","_replication_state":"completed","_replication_state_time":"2013-04-29T08:09:53+00:00","_replication_id":"cd589cae67f2f59ec6bf274fa35ec32b","_replication_stats":{"revisions_checked":1994,"missing_revisions_found":1994,"docs_read":1994,"docs_written":1994,"doc_write_failures":0,"checkpointed_source_seq":232955728}}

# using the _rev from the GET above

$ curl -X DELETE "http://stefan:***********@127.0.0.1:5984/_replicator/mygpo_categories?rev=5-35ceab198cf3edc63865dcb081551ae8"
{"error":"conflict","reason":"Document update conflict."}

[Sun, 05 May 2013 08:11:34 GMT] [info] [<0.29753.56>] 127.0.0.1 - - DELETE /_replicator/mygpo_categories?rev=5-35ceab198cf3edc63865dcb081551ae8 409


>>> import couchdb
>>> db = couchdb.Database('http://stefan:***********@127.0.0.1:5984/_replicator')
>>> del db['mygpo_categories']

[Sun, 05 May 2013 08:13:19 GMT] [info] [<0.30842.56>] 127.0.0.1 - - HEAD /_replicator/mygpo_categories 304
[Sun, 05 May 2013 08:13:19 GMT] [info] [<0.30842.56>] 127.0.0.1 - - DELETE /_replicator/mygpo_categories?rev=5-c47b02b467c00042a9c0a1abcd5040c4 200

# this used a different _rev, but still a 5-something. conflict?


$ curl http://127.0.0.1:5984/_replicator/mygpo_categories

[Sun, 05 May 2013 08:13:31 GMT] [error] [<0.31068.56>] function_clause error in HTTP request
[Sun, 05 May 2013 08:13:31 GMT] [info] [<0.31068.56>] Stacktrace: [{couch_replicator_manager,
                                    strip_credentials,                          
                                    [undefined],                                
                                    [{file,"src/couch_replicator_manager.erl"}, 
                                     {line,695}]},                              
                                   {couch_replicator_manager,after_doc_read,    
                                    2,                                          
                                    [{file,"src/couch_replicator_manager.erl"}, 
                                     {line,683}]},                              
                                   {couch_db,open_doc_int,3,                    
                                    [{file,"couch_db.erl"},{line,1203}]},       
                                   {couch_db,open_doc,3,                        
                                    [{file,"couch_db.erl"},{line,141}]},        
                                   {couch_httpd_db,couch_doc_open,4,            
                                    [{file,"couch_httpd_db.erl"},{line,802}]},  
                                   {couch_httpd_db,db_doc_req,3,                
                                    [{file,"couch_httpd_db.erl"},{line,498}]},  
                                   {couch_httpd_db,do_db_req,2,                 
                                    [{file,"couch_httpd_db.erl"},{line,234}]},  
                                   {couch_httpd,handle_request_int,5,           
                                    [{file,"couch_httpd.erl"},{line,331}]}]     
[Sun, 05 May 2013 08:13:31 GMT] [info] [<0.31068.56>] 127.0.0.1 - - GET /_replicator/mygpo_categories 500
[Sun, 05 May 2013 08:13:31 GMT] [error] [<0.31068.56>] httpd 500 error response:
 {"error":"unknown_error","reason":"function_clause"}