I installed Redcar via Rubygems without any problems on my linux machine. However, it won't start. Here is the output of redcar command;

$ redcar Redcar 0.8.1 ( i686-linux )
java -d32 -client -Xmx500m -Xss1024k -Djruby.memory.max=500m -Djruby.stack.max=1024k -cp /home/umut/.redcar/assets/jruby-complete-1.5.3.jar org.jruby.Main /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar --no-sub-jruby --ignore-stdin
Redcar 0.8.1 ( java )
loading plugins took 4.833
took 1.064s to load textmate assets
Error in: undefined method get_instance' for Java::OrgEclipseSwtDnd::TextTransfer:Class<br/> NoMethodError: undefined methodget_instance' for Java::OrgEclipseSwtDnd::TextTransfer:Class
/usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/clipboard.rb:22:in plain_text_data_type' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/clipboard.rb:38:inget_contents' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/clipboard.rb:16:in initialize' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:178:innew' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:178:in create_clipboard' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:99:ininitialize' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:1121:in new' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:1121:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:21:in update_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:5:insafely' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:20:in update_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:incall' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:in sync_exec' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:incall' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:in run' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/event_loop.rb:13:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/gui.rb:39:in start' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:180:inpump' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:30 error in sync exec
undefined method fake_shell' for nil:NilClass<br/> /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/dialog_adapter.rb:152:inparent_shell' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/dialog_adapter.rb:50:in message_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:52:inmessage_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:12:in in_dialog' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:52:inmessage_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:12:in safely' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:20:inupdate_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:in call' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:insync_exec' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:in call' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:inrun' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/event_loop.rb:13:in start' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/gui.rb:39:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:180:in pump' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:30 project start took 0.005s<br/>

<Redcar::ApplicationSWT::Treebook:0x1fce2f2>#<Redcar::ApplicationSWT::Treebook:0x1fce2f2>#<Redcar::ApplicationSWT::Treebook:0x1fce2f2>Error in: undefined method image=' for #<Java::OrgEclipseSwtWidgets::Shell:0x1be9a50>

NoMethodError: undefined method image=' for #<Java::OrgEclipseSwtWidgets::Shell:0x1be9a50><br/> /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/window.rb:155:inset_icon' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/window.rb:48:in initialize' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:182:innew' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:182:in new_window' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt.rb:139:into_proc' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/observable.rb:103:in call' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/observable.rb:103:inobservable_run_blocks' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/observable.rb:103:in map' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/observable.rb:103:inobservable_run_blocks' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/observable.rb:96:in notify_listeners' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application.rb:122:innew_window' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application.rb:134:in make_sure_at_least_one_window_open' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:1132:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:21:in update_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:5:insafely' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:20:in update_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:incall' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:in sync_exec' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:incall' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:in run' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/event_loop.rb:13:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/gui.rb:39:in start' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:180:inpump' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:30 error in sync exec
undefined method fake_shell' for nil:NilClass<br/> /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/dialog_adapter.rb:152:inparent_shell' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application_swt/lib/application_swt/dialog_adapter.rb:50:in message_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:52:inmessage_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:12:in in_dialog' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/application/lib/application/dialog.rb:52:inmessage_box' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:12:in safely' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/redcar/redcar.rb:20:inupdate_gui' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:in call' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:105:insync_exec' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:in call' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/full_swt.rb:95:inrun' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt/event_loop.rb:13:in start' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/core/lib/core/gui.rb:39:instart' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:180:in pump' /usr/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:30 start time: 6.624