Lucky Day sends word of a 1.6.5 patch for the Atari version of King's Bounty:

King's Bounty: The Legend patch (version 1.6.5) is now available for download. This patch is for use with the English version of King’s Bounty: The Legend released on September 23 by Atari.

The patch fixes several issues with video and game balance, as well as some other bugs. Please find full list of fixes here. You can download the patch (9.22 Mb) here.

Looking at the GamersGate version, it appears they've had this patch for a little while.