Problems with 'localization simplified'

In fact no. I’ve started again my application and I have the same errors
(see below). This is not an help request. Simply to tell that
localization simplified gives too problems, and I’ll not use it anymore.
I’m going the heavy way, globalize…

can’t convert nil into String
/Users/stratboy/Documents/05_SAMPLES/RAILS/newser/vendor/plugins/l10n-simplified-0.8/lib/localization_simplified.rb:13:in
gsub!' /Users/stratboy/Documents/05_SAMPLES/RAILS/newser/vendor/plugins/l10n-simplified-0.8/lib/localization_simplified.rb:13:inlocalize_strftime’
/Users/stratboy/Documents/05_SAMPLES/RAILS/newser/vendor/plugins/l10n-simplified-0.8/lib/localization_simplified.rb:191:in
strftime' /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/core_ext/time/conversions.rb:19:into_s’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_ext/session_performance_fix.rb:21:in
create_new_id' /opt/local/lib/ruby/1.8/cgi/session.rb:267:ininitialize’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:132:in
new' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:132:insession’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:164:in
stale_session_check!' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/cgi_process.rb:116:insession’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:1058:in
assign_shortcuts_without_flash' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/flash.rb:140:inassign_shortcuts’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:429:in
process_without_filters' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/filters.rb:684:inprocess_without_session_management_support’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/session_management.rb:114:in
process' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/base.rb:334:inprocess’
/opt/local/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in
dispatch' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:78:inprocess’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in
synchronize' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:inprocess’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:618:in
process_client' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:ineach’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in
process_client' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:inrun’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
initialize' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:innew’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in
run' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:ininitialize’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in
new' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:inrun’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:271:in
run' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:ineach’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in
run' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:127:inrun’
/opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in
run' /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:243 /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:488:inload’
/opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:488:in
load' /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:innew_constants_in’
/opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:488:in
load' /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/servers/mongrel.rb:60 /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:ingem_original_require’
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:inrequire’
/opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in
new_constants_in' /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:inrequire’
/opt/local/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
script/server:3