here is a small installation which comes from 1.0.1 and is now 1.1

Upgrades to 2.0 or 1.2 (both are documented upgrade souces) fails.

At both senarios all patches are installed at the source and I use the newst
2.0 build (421) incl. the both patches.

Directly after the upgrade, it seems that all things are running fine but
after a little change at the config (Maybe a new license at 2.0, or switch
to https-links in mails at 1.2) and the reconfig runs all users are gone and
no netfolders are visible.

Any hints?