empty request bug

payload:
{\"permalink\":null,\"title\":null,\"suite101_article_id\":null,\"cookie_id\":null,\"date\":\"2011-03-17T18:51:31Z\",\"referrer_url\":\"\",\"writer_id\":null}"

exception:
Validation failed: Title can't be blank, Title can't be blank, Title is too short (minimum is 3 characters), Suite101 article can't be blank, Suite101 article is not a number, Permalink can't be blank, Permalink is too short (minimum is 3 characters), Writer can't be blank, Writer is not a number, Cookie can't be blank, Cookie is too short (minimum is 3 characters)
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/validations.rb:49:in `save!'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/attribute_methods/dirty.rb:30:in `save!'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/transactions.rb:245:in `save!'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/transactions.rb:292:in `with_transaction_returning_status'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:139:in `transaction'
/var/cache/engineyard/ruby/1.8/gems/ar-octopus-0.3.4/lib/octopus/proxy.rb:129:in `transaction'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/transactions.rb:207:in `transaction'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/transactions.rb:290:in `with_transaction_returning_status'
/var/cache/engineyard/ruby/1.8/gems/activerecord-3.0.4/lib/active_record/transactions.rb:245:in `save!'
/data/suite101/releases/20110317184318/app/models/raw_page_view.rb:36:in `unique?'
/data/suite101/releases/20110317184318/app/jobs/raw_page_view_job.rb:11:in `perform'
/data/suite101/releases/20110317184318/app/jobs/raw_page_view_job.rb:25:in `select_shard'
/data/suite101/releases/20110317184318/app/jobs/raw_page_view_job.rb:7:in `perform'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/job.rb:133:in `perform'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/worker.rb:162:in `perform'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/worker.rb:129:in `work'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/worker.rb:115:in `loop'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/worker.rb:115:in `work'
/var/cache/engineyard/ruby/1.8/gems/resque-1.13.0/lib/resque/tasks.rb:27
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/usr/lib64/ruby/1.8/monitor.rb:242:in `synchronize'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/var/cache/engineyard/ruby/1.8/gems/rake-0.8.7/bin/rake:31
/var/cache/engineyard/ruby/1.8/bin/rake:19:in `load'
/var/cache/engineyard/ruby/1.8/bin/rake:19