Raxco released v.43 of Perfectdisk 2008 and then pulled it.
According to the Perfectdisk Blog it was because of a “gotcha” (a forum post states it is because of “some debugging code was not removed from build 43 prior to its release“.
Here is the changelog for whenever they re-release v.43:
* Defrag speed has been improved again. The development team has found new ways to better utilize memory and has also implemented a new algorithm for moving faster through fragmented and non-fragmented files.
* Added new functionality to print statistics.
* Added ability to resize GUI.
* Improved ability to work with 800×600 screen resolutions.
* Added ability to set a license key via Active Directory Group Policy.
* Added the logging of a reason why a StealthPatrol schedule was suspended.
* Added “Every X weeks” field to the Exchange weekly schedule.
* Updated Help files.