Galera,
Esqueci de avisar que estou usando a versão 1.2.6 do Rails
Segui as intruções: Primeiro o rake e...
paulo@paulo:~/work/gtd$ rake db:drop:all --trace
(in /home/paulo/work/gtd)
rake aborted!
Don't know how to build task 'db:drop:all'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1706:in `[]'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2018:in `invoke_task'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `each'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in `top_level'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `run'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling'
/var/lib/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run'
/var/lib/gems/1.8/gems/rake-0.8.3/bin/rake:31
/var/lib/gems/1.8/bin/rake:16:in `load'
/var/lib/gems/1.8/bin/rake:16