rails - postgres error: Reason: Incompatible library version: libpq.5.dylib requires version 1.0.0 or later,

Question

I am stuck with the setup of Ruby (1.9.3), Rails and Postgres (9.0.8) on my Mac (10.6.8). Everytime when I run rails console I get the following error:

Answer 1

In one project this solution ("gem install & uninstall pg") was fine.

But in another project, that uses the same rails and Postgres version, I had to be explicit with version in gemfile to make it work:

  gem 'pg', '0.14.1'