SpamSieve 2.4.1 is now available. It includes the following enhancements:

• SpamSieve is now a universal binary.
• Made various changes to SpamSieve’s tokenizer and HTML parser to improve accuracy.
• Improved filtering of messages containing attachments.
• Added Apple Mail settings to control whether messages trained as spam are marked as read and/or left on the server.
• Better at finding notification sounds that are built into mail clients.
• Now shows uncertain growls when notification is suppressed.
• SpamSieve now delegates more file reveal operations to Path Finder 4, since it fixes a bug in Path Finder 3 that prevented certain reveals from working.
• Rather than typing (or copying and pasting) your name and serial number to personalize SpamSieve, you can now click the x-spamsieve:// URL that’s sent to you when you purchase SpamSieve or get a serial number reminder.
• Fixed bug where the rules list would scroll one rule up if it was scrolled to the bottom and you edited a rule.
• Added Spanish localization and updated the Danish, Italian, Swedish, and Vietnamese localizations.
• Improved the installation and troubleshooting documentation.
• Removed spurious Section 4.4.1 of the manual.

Update: Several people have asked what “shows uncertain growls when notification is suppressed” means. SpamSieve can use the Growl global notification system to display notifications when various kinds of messages are received. The “uncertain” notification lets you know when SpamSieve put a borderline message in the spam folder—the idea being that when you see the notification you can look in the spam folder to make sure the message is actually spam. SpamSieve 2.4 added an AppleScript option (currently not widely adopted) called “suppressing notification” so that when you re-apply SpamSieve to old messages it doesn’t play the new message sound, bounced the Dock icon, display growls, etc. However, in most cases you would not want the uncertain growl to be supressed, so in 2.4.1 it isn’t.