Error in api when caching enabled

I’m not sure if I have something messed up with my install or if this
is actually a bug. I have Rails fragment caching enabled with the
memcache store, and it speeds up my blog rendering in browsers quite a
lot. I’m not sure if this is a Rails issue, a Memcache client issue,
or a Typo issue. (The memcache client plugin in Typo is quite
outdated, but the latest one doesn’t have a ‘delete_if’ method
either.) Can anyone comment on it?

Processing BackendController#xmlrpc (for 67.41.118.40 at 2007-12-31
11:47:49) [POST]
Parameters: {“action”=>“xmlrpc”, “controller”=>“backend”,
“methodCall”=>{“methodName”=>“metaWeblog.newPost”,
“params”=>{“param”=>[{“value”=>{“string”=>“0”}},
{“value”=>{“string”=>“username”}}, {“value”=>{“string”=>“password”}},
{“value”=>{“struct”=>{“member”=>[{“name”=>“mt_keywords”,
“value”=>{“string”=>“test”}}, {“name”=>“mt_convert_breaks”,
“value”=>{“string”=>“textile”}}, {“name”=>“title”,
“value”=>{“string”=>“Testing, Testing”}}, {“name”=>“categories”,
“value”=>{“array”=>{“data”=>{“value”=>{“string”=>“General”}}}}},
{“name”=>“description”, “value”=>{“string”=>“test from
TextMate\n\n”}}, {“name”=>“mt_text_more”, “value”=>{“string”=>“\nif
you can read this, the API is working”}}]}}},
{“value”=>{“boolean”=>“1”}}]}}}
Casting of method parameters failed
HTTP-Error: 405 Method Not Allowed
HTTP-Error: 302 Found
Expiring #Article:0x2aec802a7500, with controller:
#BackendController:0x2aec8031ee98

NoMethodError (undefined method delete_if' for <MemCache: 1 servers, 0 buckets, ns: nil, ro: false>:MemCache): /vendor/rails/actionpack/lib/action_controller/caching.rb:454:in delete_matched’
/vendor/rails/actionpack/lib/action_controller/caching.rb:426:in
expire_fragment' /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:30:in benchmark’
/vendor/rails/actionpack/lib/action_controller/caching.rb:425:in
expire_fragment' /vendor/rails/actionpack/lib/action_controller/caching.rb:664:in send!’
/vendor/rails/actionpack/lib/action_controller/caching.rb:664:in
method_missing' /app/models/blog_sweeper.rb:63:in sweep_articles’
/app/models/blog_sweeper.rb:41:in expire_for' /app/models/blog_sweeper.rb:27:in after_save’
/vendor/rails/activerecord/lib/active_record/observer.rb:157:in
send' /vendor/rails/activerecord/lib/active_record/observer.rb:157:in update’
/usr/local/lib/ruby/1.8/observer.rb:185:in notify_observers' /usr/local/lib/ruby/1.8/observer.rb:184:in each’
/usr/local/lib/ruby/1.8/observer.rb:184:in notify_observers' /vendor/rails/activerecord/lib/active_record/callbacks.rb:338:in notify’
/vendor/rails/activerecord/lib/active_record/callbacks.rb:302:in
callback' /vendor/rails/activerecord/lib/active_record/callbacks.rb:214:in create_or_update’
/vendor/rails/activerecord/lib/active_record/base.rb:1972:in
save_without_validation' /vendor/rails/activerecord/lib/active_record/validations.rb:934:in save_without_transactions’
/vendor/rails/activerecord/lib/active_record/transactions.rb:108:in
save' /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:66:in transaction’
/vendor/rails/activerecord/lib/active_record/transactions.rb:80:in
transaction' /vendor/rails/activerecord/lib/active_record/transactions.rb:100:in transaction’
/vendor/rails/activerecord/lib/active_record/transactions.rb:108:in
save' /vendor/rails/activerecord/lib/active_record/transactions.rb:120:in rollback_active_record_state!’
/vendor/rails/activerecord/lib/active_record/transactions.rb:108:in
save' /app/apis/meta_weblog_service.rb:101:in newPost’
/vendor/actionwebservice/lib/action_web_service/invocation.rb:141:in
send' /vendor/actionwebservice/lib/action_web_service/invocation.rb:141:in perform_invocation_without_interception’
/vendor/actionwebservice/lib/action_web_service/invocation.rb:135:in
perform_invocation' /vendor/actionwebservice/lib/action_web_service/dispatcher/abstract.rb:46:in web_service_filtered_invoke’
/vendor/actionwebservice/lib/action_web_service/dispatcher/abstract.rb:41:in
web_service_delegated_invoke' /vendor/actionwebservice/lib/action_web_service/dispatcher/abstract.rb:60:in web_service_invoke’
/vendor/actionwebservice/lib/action_web_service/dispatcher/abstract.rb:25:in
invoke_web_service_request' /vendor/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb:58:in dispatch_web_service_request’
/usr/local/lib/ruby/1.8/benchmark.rb:293:in measure' /vendor/actionwebservice/lib/action_web_service/dispatcher/action_controller_dispatcher.rb:56:in dispatch_web_service_request’
(eval):1:in xmlrpc' /vendor/rails/actionpack/lib/action_controller/base.rb:1158:in send’
/vendor/rails/actionpack/lib/action_controller/base.rb:1158:in
perform_action_without_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:697:in call_filters’
/vendor/rails/actionpack/lib/action_controller/filters.rb:725:in
run_before_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:664:in call’
/vendor/rails/actionpack/lib/action_controller/filters.rb:664:in
proxy_before_and_after_filter' /vendor/rails/actionpack/lib/action_controller/filters.rb:483:in call’
/vendor/rails/actionpack/lib/action_controller/filters.rb:483:in
call' /vendor/rails/actionpack/lib/action_controller/filters.rb:722:in run_before_filters’
/vendor/rails/actionpack/lib/action_controller/filters.rb:695:in
call_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:689:in perform_action_without_benchmark’
/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in
perform_action_without_rescue' /usr/local/lib/ruby/1.8/benchmark.rb:293:in measure’
/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in
perform_action_without_rescue' /vendor/rails/actionpack/lib/action_controller/rescue.rb:199:in perform_action_without_caching’
/vendor/rails/actionpack/lib/action_controller/caching.rb:678:in
perform_action' /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in cache’
/vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in
cache' /vendor/rails/actionpack/lib/action_controller/caching.rb:677:in perform_action’
/vendor/rails/actionpack/lib/action_controller/base.rb:524:in send' /vendor/rails/actionpack/lib/action_controller/base.rb:524:in process_without_filters’
/vendor/rails/actionpack/lib/action_controller/filters.rb:685:in
process_without_session_management_support' /vendor/rails/actionpack/lib/action_controller/session_management.rb:123:in process’
/vendor/rails/actionpack/lib/action_controller/base.rb:388:in
process' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:171:in handle_request’
/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:115:in
dispatch' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:126:in dispatch_cgi’
/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:9:in
dispatch' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/rails.rb:76:in process’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/rails.rb:74:in
synchronize' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/rails.rb:74:in process’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:159:in
process_client' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:158:in each’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:158:in
process_client' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:285:in run’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:285:in
initialize' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:285:in new’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:285:in
run' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:268:in initialize’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:268:in
new' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel.rb:268:in run’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/configurator.rb:282:in
run' /usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/configurator.rb:281:in each’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/configurator.rb:281:in
run' /usr/local/lib/ruby/gems/1.8/gems/swiftiply-0.6.1.1/bin/mongrel_rails:136:in run’
/usr/local/lib/ruby/gems/1.8/gems/mongrel-1.1.3/lib/mongrel/command.rb:212:in
run' /usr/local/lib/ruby/gems/1.8/gems/swiftiply-0.6.1.1/bin/mongrel_rails:252 /usr/local/bin/mongrel_rails:19:in load’
/usr/local/bin/mongrel_rails:19

Sending data
Completed in 0.98284 (1 reqs/sec) | Rendering: 0.00008 (0%) | DB:
0.00000 (0%) | 200 OK [almostserio.us]