I just tried to upgrade from 2.1.0 to 2.1.1, doing a full package upgrade. The script stuff seems to have worked fine, but I'm having troubles with a DB upgrade, running php upgrade.php upgrade from the /tools directory.
This is the error message:
PHP Warning: Module 'gd' already loaded in Unknown on line 0
PHP Warning: Module 'iconv' already loaded in Unknown on line 0
ERROR: Upgrade failed: DB: Duplicate entry 'email@example.com
' for key 3
Since I started to upgrade because I got duplicate key entries on file uploads, I must say I find this quite ironic