The installer package for Panther will work for Tiger as well. If you want to install a second installation of Ruby, you can use it for that. However, I would strongly reccommend just fixing Apple's installation this time, since they have the most recent stable version installed.
Sometime in the next week or so, I hope to put up an installer package that will repair the tiger installation. Until then, you can use the information on the Ruby on Rails site to get your Tiger Ruby install up to snuff.
Yet another update :) I put up two packages (look at the bottom of the page); Ruby 1.8.2 Stable for Panther, and, by popular demand, 1.8.2 Stable for Jaguar. Make sure you download the right one - the panther and jaguar versions will not run properly on the wrong operating system.
This package has some nifty things built in:
To use your new intallation of ruby, add /usr/local/bin to the beginning of your path. To revert back to the older one, make sure that /usr/bin comes before /usr/local/bin in your path.
Note that you must make the change to your path, or you won't be able to use your new ruby installation. If you don't know how, or just want it done for you, paste this line into your terminal:
curl http://homepage.mac.com/discord/Ruby/set_path.rb | ruby
To install, click the download link and mount the disk image. Open "Ruby.mpkg" and follow the installation instructions. If you want the sample code and/or Emacs support files, copy the Extras folder to wherever you want to keep it :)
Before you can use TclTk, you need to install the TclTkAqua framework. Go to the TclTkAqua Sourceforge page and download the proper version for your operating system:
Ruby 1.8.2 Stable for MacOS X 10.3 Panther (dmg)
Ruby 1.8.2 Stable for MacOS X 10.2 Jaguar (dmg)
Any Questions? If you have any questions, problems, or requests, you can send them here.