The list of changes in The Bat! v5.3.8:

Improvements

• Original splash screen
• Some mailers are known to violate RFC2047 5.(3) and split multi-octet character across adjacent 'encoded-word's (we concatenate adjacent 'encoded-word's with the same character set to work around this issue)
• User interface fixes at the Account" menu
• Cosmetic fixes under the "Account -> Properties" menu
• yandex.ru e-mail settings were added

• Message Finder: the option for searching of the whole words only was ignored
• Messages about invalid PNG files are not displayed; instead as much data as possible is recovered from the broken images
• RFC-822 headers weren't immediately visible when selecting HTML message ("View > RFC-822 Headers" mode)
• An account with non-administrator privileges could not operate the "Preferences" dialogue
• IMAP. Negative counter error after message expunging
• Changes of column widths in Address Book tree were lost after program restart
• Birthday notification can be invisible and lock the program
• HTML template cannot be used for messages created from command line
• Source View - the Print function was not working correctly
• "TTaskUpdater.DecUse: negative reference counter, the "already destroyed!" error message while performing folder maintenance
• Possible multi-threading problem while terminating folder maintenance
• Current server's SMTP Authentication settings were not taken into the configuration dialogue when "SMTP on-the-go" was used
• "Watch and Send files" scheduler action incorrectly encoded long file names
• PluginAPI. The filter wasn't used when getting the message list
• Some 8-bit encoding problems when sending a message to an Address Group