I'm getting an exception with RubyAMF using Ruby 1.9 and Rails 2.3.5. Although code afterward executes normally I'm not very comfortable with seeing such exception in the log file. Do you know what is causing it:

>>>>>>>> RubyAMF >>>>>>>>> #<RubyAMF::Actions::PrepareAction:0x0000010139ff48> took: 0.00020 secs
>>>>>>>> RubyAMF >>>>>>>>> #<RubyAMF::Actions::RailsInvokeAction:0x0000010139ff10> took: 0.29973 secs
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.include?
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:142:in `create_time_zone_conversion_attribute?'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:75:in `block in define_attribute_methods'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:71:in `each'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:71:in `define_attribute_methods'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:242:in `method_missing'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/base.rb:2832:in `hash'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:366:in `hash'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:366:in `hash'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:366:in `[]='
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:366:in `store_object'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:234:in `write_amf3_object'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:154:in `write_amf3'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:78:in `write'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:70:in `block in run'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:56:in `upto'
/Users/tammam56/lal/vendor/plugins/ruby_amf/io/amf_serializer.rb:56:in `run'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/filters.rb:91:in `block in run'
/Users/tammam56/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1/benchmark.rb:309:in `realtime'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/filters.rb:91:in `run'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/filters.rb:12:in `block in run'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/filters.rb:11:in `each'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/filters.rb:11:in `run'
/Users/tammam56/lal/vendor/plugins/ruby_amf/app/rails_gateway.rb:28:in `service'
/Users/tammam56/lal/app/controllers/rubyamf_controller.rb:19:in `gateway'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/base.rb:1331:in `perform_action'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/filters.rb:617:in `call_filters'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in `perform_action_with_filters'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `block in perform_action_with_benchmark'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `block in ms'
/Users/tammam56/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/1.9.1/benchmark.rb:309:in `realtime'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_with_benchmark'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in `perform_action_with_rescue'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/flash.rb:146:in `perform_action_with_flash'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process_with_filters'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:in `process'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:87:in `dispatch'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:121:in `_call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:130:in `block in build_middleware_stack'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `block in call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in `cache'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/head.rb:9:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/session/cookie_store.rb:93:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/lock.rb:11:in `block in call'
<internal:prelude>:8:in `synchronize'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:114:in `block in call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:34:in `run'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/rails/rack/static.rb:31:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `block in call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rails-2.3.5/lib/rails/rack/log_tailer.rb:17:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/content_length.rb:13:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/chunked.rb:15:in `call'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/rack-1.0.1/lib/rack/handler/mongrel.rb:64:in `process'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `block in process_client'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client'
/Users/tammam56/.rvm/gems/ruby-1.9.1-p378/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `block (2 levels) in run

'