On 9/19/05, Simon Marlow <simonmar@microsoft.com> wrote:
The GHC Team is pleased to announce a new patchlevel release of GHC.
This release contains a significant number of bugfixes relative to
6.4, so we recommend upgrading. No library APIs have changed, so code
that was working with 6.4 should continue to work with 6.4.1.