Minimalist GNU for Windows
SourceForge provides a mechanism to distribute packages and releases. The MinGW team are using that to provide package repositories of Current, Candidate, Snapshot, Previous and Proposed. Each repository contains its own set of packages.
The Previous package contains a repository of packages that were the previous version found in the approved Current packages repository. If you find that the released Current version is less adequate then revert to the Previous and let the developers know.