Take for example http://rubygems.org/gems/rake .
We offer as a suggestion for the Gemfile
gem "rake", "~> 0.9.2.2"
But i believe this wrong. The SemVer doc says
"Major version zero (0.y.z) is for initial development. Anything may change
at any time. The public API should not be considered stable."
So, shouldn't rubygems suggest something like
gem "rake", "0.9.2.2"