Version 6.2a of TrueCrypt, the free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux has been released.
Improvements and bug fixes
Improved file container creation speed on systems having issues with write block sizes greater than 64 KB. (Windows)
The ‘Device not ready’ error will no longer occur when the process of decryption of a system partition/drive is finished. (Windows)
Other minor improvements and bug fixes. (Windows, Mac OS X, and Linux)
For an overview of how TrueCrypt works read this article and to download the new version click here.