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.

Good job! The program I was working on today runs 24% faster with 6.4.1 compared to 6.4 :-)

Best regards
Tomasz