downgrading from 1.2.3 to 1.1.2

Clem Rock wrote:

Hello,

    I just did a rails -v and got Rails 1.2.3. I just realized that I
had installed the wrong version of ruby on my local environment.

How easy is it to downgrade to 1.1.2? Are there any big issues I
should consider before doing this?

What do you mean by wrong version of Ruby? There's no need to downgrade,
however it can be done with:

sudo gem uninstall rails
sudo gem uninstall activesupport
sudo gem uninstall activerecord
sudo gem uninstall actionmailer
sudo gem uninstall actionpack

and then
sudo gem install rails --include-dependencies --version=1.1.2

cheers,
Sava