SpamSieve 2.4.4 is now available. It includes the following enhancements:

• Made various changes to improve SpamSieve’s accuracy, particularly when processing blank messages, HTML messages, and messages containing images.
• The following strings may now be used in rules to match headers that are missing: <SpamSieve-Unknown-Subject>, <SpamSieve-Unknown-From>, <SpamSieve-Unknown-FromName>, <SpamSieve-Unknown-To>. It is somewhat common for messages to have a blank subject (which can be matched using the empty string), but legitimate messages that omit the Subject for From header are rare, and now these can easily be matched by creating the appropriate rules on the blocklist.
• Quit when mail client quits is now enabled by default.
• Log entries are now abbreviated when the string that matched the rule is long.
• The Apple Mail Train as Good command can now move messages out of submailboxes of the Junk mailbox.
• The Apple Mail plug-in installer works better when the folder permissions are messed up.
• Can now auto-recover from damaged message store files, rather than complaining to the user about them.
• If SpamSieve is hidden when launched, it will refrain from opening the Training Tip window.
• Improved the documentation, training tips, and localizations.
• Various code modernization and bullet-proofing throughout.
• Fixed localization bugs that could cause crashes.
• Fixed crash when hiding the progress panel.
• Fixed crash when saving false negatives to disk.
• Made changes to the Entourage scripts to try to work around an OS bug that causes them to grow and eventually become corrupted.
• Worked around OS bug to prevent freezes when attempting to play damaged sound files.