1.4.0 is a security update which fixes a vulnerability in Sparkle, Boxer's automatic updater. (Oh, the irony.)

This update is recommended for all Boxer 1.3.2 users on OS X 10.6 and above. If you are using a prerelease development build of Boxer, you should switch to this release or build from the latest source code.

1.3.3 is a security update which fixes a vulnerability in Sparkle, Boxer's automatic updater. (Oh, the irony.)

This update is recommended for all Boxer users who are still on OS X 10.5. If you are using OS X 10.6 or newer, you should upgrade to Boxer 1.4.0 instead.