The stable Bioperl release 1.4 is available for immediate use at: http://bioperl.org/DIST. We are releasing simultaneously three modules: bioperl-core - core bioperl modules ( gz b2z) bioperl-ext - C compiled extensions ( gz b2z) bioperl-run - wrappers for external programs ( gz b2z) They will also appear shortly at the IUBIO mirror (later today) and in CPAN.