Michael Tsai has released SpamSieve 2.4.1, an update to his Bayesian spam filtering utility for popular email clients such as Apple Mail, Mailsmith, Entourage, PowerMail, and Eudora. The new version offers numerous changes, including: Universal Binary support; various changes to SpamSieve’s tokenizer and HTML parser to improve accuracy; improved filtering of messages containing attachments; and much more. SpamSieve is priced at US$25 and requires Mac OS X 10.2.8 or later (10.3.5 or later recommended).