Redmine

After upgrade to new Redmine version I get this error message:

Thu Jun 02 14:03:10 +0400 2011: Error calling Dispatcher.dispatch #<NoMethodError: undefined method `[]' for nil:NilClass>
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/cgi.rb:108:in `send_cookies'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/cgi.rb:136:in `out'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/http_response.rb:65:in `start'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/cgi.rb:135:in `out'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:81:in `process'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:159:in `process_client'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `each'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:158:in `process_client'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `initialize'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `new'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:285:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `initialize'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `new'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel.rb:268:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:282:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:281:in `each'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/configurator.rb:281:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/command.rb:212:in `run'
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281
/usr/bin/mongrel_rails:19:in `load'
/usr/bin/mongrel_rails:19

I don't have this problem with Webrick.
As I see this is a different error from that (http://www.redmine.org/boards/2/topics/11265) and the patch which was attached to that topic didn't help me.