Hi,
Here is the result of my investigations regarding the differences between the newdev.dll contained inside this hotfix and the one in KB883667.
Using the DarumGrim security binary diffing tool ( http://research.eeye.com/html/tools/RT20060801-1.html ), I could see which functions were changed.
The changes are minimal : it seems to be related to a better error-handling though ?
I uploaded two images relating to the differences.
So far, I'm not running into problems with this hotfix (requested to prevent issues during sysprep deployments).
Thanks again for the hotfix.