[Rails] attachment_fu, how to regenerate thumbnails

i'm using this plugin for files and images uploads.
it has a very useful feature that generate thumbnails of every
uploaded image, based on the geometry given in the model definition.
now i want to change the size of one of the thumbnail: how can i re-
generate them for the already saved image?

i found this http://github.com/kete/kete/blob/master/lib/tasks/tools.rake
but i don't understand how to use it.

--

You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.