These are patch releases recommended for anybody who has already upgraded to 2.10.
### rspec-mocks-2.10.1 full changelog: Comparing v2.10.0...v2.10.1 · rspec/rspec-mocks · GitHub
Bug fixes
* fix [regression of edge case behavior](https://github.com/rspec/rspec-mocks/issues/132) * fixed failure of `object.should_receive(:message).at_least(0).times.and_return value` * fixed failure of `object.should_not_receive(:message).and_return value`
### rspec-rails-2.10.1 full changelog: Comparing v2.10.0...v2.10.1 · rspec/rspec-rails · GitHub
Bug fixes
* fix [regression introduced in 2.10.0 that broke integration with Devise](undefined method `env' for nil:NilClass in RSpec 2.10 · Issue #534 · rspec/rspec-rails · GitHub)