This is to announce that testing for 6.4.1 has begun. Snapshots from 20050730 onwards are release candidates - please test if you can. Snapshots are available from here: http://www.haskell.org/ghc/dist/stable/dist/ we have source snapshots, and binaries for Linux/x86 (RH 9.1 era), Linux/x86_64 (FC3 era), and Windows. A *huge* number of fixes have gone in since 6.4. Also, big news is that Linux/x86_64 will have a new native code generator and GHCi support (including Template Haskell), so we'd especially like to hear from anyone that can test on Linux/x86_64. The GHCi support isn't complete: the interpreter can't currently handle FFI, and there are problems with data references to shared libraries from dynamically-loaded .o files, but otherwise it should be functional. We're planning for a release in 1-2 weeks. I'm going to be offline for a while from mid-Aug, but hopefully we'll get the release out before then. Please remember to put the full version number in any bug report, and happy testing! Cheers, Simon