C-Command Software has released SpamSieve 2.9.6 with a fix for a bug that slowed down spam-filtering operations in Postbox when running OS X 10.8.2 Mountain Lion. The update now understands that @icloud.com, @me.com, and @mac.com addresses are equivalent for training purposes in Apple Mail, and SpamSieve also offers to load addresses from Microsoft Outlook directly rather than use the less-than-reliable Sync Services to perform that task. The release also removes flags from a message trained as good in Apple Mail, improves handling of invalid data received from a mail program, and improves interaction between SpamSieve and server-based spam mailboxes to prevent a trained spam message from ending up in the local spam mailbox. ($30 new with a 20-percent discount for TidBITS members, free update, 10.4 MB, release notes)
Extract Directly from Time Machine
Normally you use Time Machine to restore lost data in a file like this: within the Time Machine interface, you go back to the time the file was not yet messed up, and you restore it to replace the file you have now.
You can also elect to keep both, but the restored file takes the name and place of the current one. So, if you have made changes since the backup took place that you would like to keep, they are lost, or you have to mess around a bit to merge changes, rename files, and trash the unwanted one.
As an alternative, you can browse the Time Machine backup volume directly in the Finder like any normal disk, navigate through the chronological backup hierarchy, and find the file which contains the lost content.
Once you've found it, you can open it and the current version of the file side-by-side, and copy information from Time Machine's version of the file into the current one, without losing any content you put in it since the backup was made.