Script/plugin uhoh..... :O

Whenever i run script/plugin -list i get this–

script/plugin -list
/usr/lib/ruby/1.8/optparse.rb:1450:in complete': invalid option: - list (OptionParser::InvalidOption) from /usr/lib/ruby/1.8/optparse.rb:1448:incatch’
from /usr/lib/ruby/1.8/optparse.rb:1448:in complete' from /usr/lib/ruby/1.8/optparse.rb:1287:inparse_in_order’
from /usr/lib/ruby/1.8/optparse.rb:1254:in catch' from /usr/lib/ruby/1.8/optparse.rb:1254:inparse_in_order’
from /usr/lib/ruby/1.8/optparse.rb:1248:in order!' from /usr/lib/ruby/1.8/optparse.rb:1339:inpermute!’
from /usr/lib/ruby/1.8/optparse.rb:1360:in parse!' from /home/david/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/ plugin.rb:513:inparse!’
from /home/david/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/
plugin.rb:534:in parse!' from /home/david/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/ plugin.rb:968 from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require’
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require’
from script/plugin:3

happened to any of you guys? whats the problem? Thanks