I usually develop in my local Dropbox folder. Some files in the tmp-folder get locked by the browsers (and keep Dropbox busy), Growl throws exceptions and so on.
Th
you can't change tmp directory, but you can configure tmp cache directory.
# config/application.rb config.cache_store = [ :file_store, "/tmp/rails-cache/" ] config.assets.cache_store = [ :file_store, "/tmp/rails-cache/assets/#{Rails.env}/" ]
you can read more at configuration.rb