Display of users page after Upgrade to CP 2 (Bug #555)

Hi,

I switched my server to chiliproject months ago, and followed along since then.
Now I also did the upgrade to ChiliProject 2.1.1, and found that the users display
do not work anymore, I get the following error log:

Processing UsersController#show (for 192.168.1.1 at 2011-08-03 13:30:02) [GET]
Parameters: {"action"=>"show", "id"=>"1", "controller"=>"users"}

ActiveRecord::ConfigurationError (Association named 'project' was not found; perhaps you misspelled it?):
lib/redmine/activity/fetcher.rb:82:in `events'
lib/redmine/activity/fetcher.rb:81:in `each'
lib/redmine/activity/fetcher.rb:81:in `events'
lib/redmine/activity/fetcher.rb:80:in `each'
lib/redmine/activity/fetcher.rb:80:in `events'
app/controllers/users_controller.rb:68:in `show'
/usr/lib/ruby/1.8/rack/adapter/rails.rb:75:in `call' /usr/lib/ruby/1.8/thin/connection.rb:76:in `pre_process'
/usr/lib/ruby/1.8/thin/connection.rb:74:in `catch'
/usr/lib/ruby/1.8/thin/connection.rb:74:in `pre_process' /usr/lib/ruby/1.8/thin/connection.rb:57:in `process'
/usr/lib/ruby/1.8/thin/connection.rb:42:in `receive_data'
/usr/lib/ruby/1.8/eventmachine.rb:240:in `run_machine'
/usr/lib/ruby/1.8/eventmachine.rb:240:in `run'
/usr/lib/ruby/1.8/thin/backends/base.rb:57:in `start' /usr/lib/ruby/1.8/thin/server.rb:156:in `start'
/usr/lib/ruby/1.8/thin/controllers/controller.rb:80:in `start' /usr/lib/ruby/1.8/thin/runner.rb:174:in `send'
/usr/lib/ruby/1.8/thin/runner.rb:174:in `run_command'
/usr/lib/ruby/1.8/thin/runner.rb:140:in `run!'
/usr/bin/thin1.8:6
Rendering /var/opt/chiliproject/public/500.html (500 Internal Server Error)

However I do not know how long this error exists, might have been introduced earlier than the upgrade to 2.0.