And it still compiles Haskell 1.2, of course. Use the -1.2 flag. HBC 0.9999.1 is a bug fix and minor update release. There are no new features. HTML documentation included.
Several bug fixes relating to existential and universal quantification.
Fix some minor Prelude discrepancies. Minor changes to make it compile on more platforms. Several minor bug fixes. This is the real reason for a new release. Floating point printing is neater and faster.