Rails Ruby on Rails

1) Error:
test_array_type_makes_an_array(NokogiriSAXEngineTest):
ArgumentError: comparison of Array with String failed

test/xml_mini/nokogirisax_engine_test.rb:213:in `assert_equal_rexml'
test/xml_mini/nokogirisax_engine_test.rb:71:in `test_array_type_makes_an_array'

rpm -qa | grep ruby
libruby-1.9.2-alt1.r30896.1
ruby-racc-runtime-1.4.6-alt2
ruby-test-unit-2.2.0-alt1
libxml-ruby-1.1.3-alt1
ruby-json-1.5.1-alt1
ruby-nokogiri-1.4.4.2-alt2
rpm-build-ruby-0.1.0-alt1
ruby-tool-setup-3.4.1-alt5
ruby-tool-rdoc-1.9.2-alt1.r30896.1
ruby-1.9.2-alt1.r30896.1
ruby-stdlibs-1.9.2-alt1.r30896.1
ruby-mocha-0.9.12-alt1
ruby-i18n-0.3.7-alt2
ruby-memcache-client-1.7.4-alt1
ruby-tzinfo-0.3.25-alt1
ruby-builder-3.0.0-alt1
ruby-tool-irb-1.9.2-alt1.r30896.1