While there is no "change log" available yet, DivX has released a update to version 6.2.2 .
To update your DivX software to version 6.2.2 just use the "Check for DivX Updates" link in your DivX start menu folder, (eg. Start > All Programs > DivX > Check for DivX Updates).
You may also update by going to http://www.divx.com/divx/ and downloading the free trial version, which will always update your DivX software to the latest version.