We have been using Plesk since version 2.0 and I have to say that this latest upgrade was atrocious. Not only did it fail numerous times, but either it or the hotfix managed to reset all the file permissions in /usr/local/psa to root:wheel - not all the files were affected, just most of them. This is TERRIBLE behaviour. And within the control panel itself, clicking on a domain displays a blank page. Terrible. I have submitted a scathing Plesk support request, hopefully their support droids will be able to fix this in a timely manner, but somehow I doubt it.