Omnidbcheck -extended has been run both prior and post the upgrade without reporting any issues.
Did both backup of idb and copy of the db40 before the upgrade, so I'm at liberty to test any suggestions in a test environment.
The upgrade was performed because of lacking support for Exchange 2013 on v7 that HP has taken way too long to qualify, causing severe delays in other projects. All clients have also all been upgraded to v8...
Support case is ofcourse open but they are working as fast as usual :-(
/Morten