Redmine

whenever I raked something(like, rake db:migrate), I got this warning:

rake/rdoctask is deprecated.  Use rdoc/task instead (in RDoc 2.4.2+)
WARNING: 'task :t, arg, :needs => [deps]' is deprecated.  Please use 'task :t, [
args] => [deps]' instead.
    at D:/RubyOnRails/projects/redmine/lib/tasks/email.rake:170

it's a minor problem for now, just to report it.

my versions:
ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]

• LOCAL GEMS ***

actionmailer (2.3.11)
actionpack (2.3.11)
activerecord (2.3.11)
activeresource (2.3.11)
activesupport (2.3.11)
cgi_multipart_eof_fix (2.5.0
gem_plugin (0.2.3)
i18n (0.4.2)
mongrel (1.1.5 x86-mingw32)
mongrel_service (0.4.0)
mysql (2.8.1 x86-mingw32)
rack (1.1.1)
rails (2.3.11)
rake (0.9.2)