Well the upgrade to 8 worked as well I've checked all the setting and nothing has changed so it must have been something that has stayed the same throughout the upgrade process that is different to a fresh install.
Beats me! I'm off to file a bug report if I can!
You can, just register at Bugzilla, click "enter a new bug" , then click "SME Server Release 8.x" . Provide as much information as you can. And provide a link to your report in this topic when done.
Thanks.