When trying to do the upgrade from Moodle 1.9.11 to Moodle 2.0 I get an DDL Execution Error.

It is at the

ALTER TABLE mdl_backup_log

It tries to add a new column backuptype nvarchar(50) Not Null

The work around is to add the new column manually prior to upgrade.

add the new column backuptype nvarchar(50 and set the default ''

The upgrade can then proceed.

However, probably better if it was fixed the upgrade script.