Encounter 500 error when select specific parameter at Issues page.

Environment: Postgres 8.2.5 + Redmine 0.7.0

To reproduce the issue, select Status = All, Author = Me, press apply, will return a 500 page. Afterwards the Issues page cannot be shown.

Workaround: clear all cookies of the browser.

Processing IssuesController#index (for x.x.x.x at 2008-05-05 10:36:25) [GET]
  Session ID: *
  Parameters: {"project_id"=>"x", "action"=>"index", "controller"=>"issues"}


ActiveRecord::StatementInvalid (PGError: ERROR:  invalid input syntax for integer: ""
: SELECT count(DISTINCT issues.id) AS count_all FROM issues 
 LEFT OUTER JOIN issue_statuses ON issue_statuses.id = issues.status_id  
 LEFT OUTER JOIN projects ON projects.id = issues.project_id  
 WHERE (issues.project_id = 2 AND (issues.author_id IN ('4')) AND (issues.status_id IS NOT NULL AND issues.status_id <> '')) ):
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:150:in `log'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:407:in `execute'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:782:in `select_raw'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:769:in `select'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all_without_query_cache'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:53:in `select_all'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:74:in `cache_sql'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:53:in `select_all'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:13:in `select_one'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:19:in `select_value'
    /vendor/rails/activerecord/lib/active_record/calculations.rb:208:in `execute_simple_calculation'
    /vendor/rails/activerecord/lib/active_record/calculations.rb:123:in `calculate'
    /vendor/rails/activerecord/lib/active_record/calculations.rb:119:in `catch'
    /vendor/rails/activerecord/lib/active_record/calculations.rb:119:in `calculate'
    /vendor/rails/activerecord/lib/active_record/calculations.rb:46:in `count'
    /app/controllers/issues_controller.rb:59:in `index'
    /vendor/rails/actionpack/lib/action_controller/base.rb:1158:in `send'
    /vendor/rails/actionpack/lib/action_controller/base.rb:1158:in `perform_action_without_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:697:in `call_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:689:in `perform_action_without_benchmark'
    /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
    /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
    /vendor/rails/actionpack/lib/action_controller/rescue.rb:199:in `perform_action_without_caching'
    /vendor/rails/actionpack/lib/action_controller/caching.rb:678:in `perform_action'
    /vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
    /vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in `cache'
    /vendor/rails/actionpack/lib/action_controller/caching.rb:677:in `perform_action'
    /vendor/rails/actionpack/lib/action_controller/base.rb:524:in `send'
    /vendor/rails/actionpack/lib/action_controller/base.rb:524:in `process_without_filters'
    /vendor/rails/actionpack/lib/action_controller/filters.rb:685:in `process_without_session_management_support'
    /vendor/rails/actionpack/lib/action_controller/session_management.rb:123:in `process'
    /vendor/rails/actionpack/lib/action_controller/base.rb:388:in `process'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:171:in `handle_request'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:115:in `dispatch'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'
    /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:9:in `dispatch'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/rack/adapter/rails.rb:49:in `serve_rails'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/rack/adapter/rails.rb:64:in `call'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/connection.rb:45:in `process'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/connection.rb:31:in `receive_data'
    /usr/local/lib/ruby/gems/1.8/gems/eventmachine-0.10.0/lib/eventmachine.rb:1056:in `event_callback'
    /usr/local/lib/ruby/gems/1.8/gems/eventmachine-0.10.0/lib/eventmachine.rb:224:in `run_machine'
    /usr/local/lib/ruby/gems/1.8/gems/eventmachine-0.10.0/lib/eventmachine.rb:224:in `run'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/backends/base.rb:34:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/server.rb:136:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/controllers/controller.rb:70:in `start'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/runner.rb:156:in `send'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/runner.rb:156:in `run_command'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/lib/thin/runner.rb:127:in `run!'
    /usr/local/lib/ruby/gems/1.8/gems/thin-0.7.1/bin/thin:6
    /usr/local/bin/thin:19:in `load'
    /usr/local/bin/thin:19

Rendering /home/postgres/redmine-0.7.0/public/500.html (500 Internal Server Error)