mysql handler ignores databases which contain "Database" in their name for "MySQL dump" method and databases=all
The following code gets used to get the list of all databases:
databases=@echo 'show databases' | su $user -c "$MYSQL $defaultsfile" | grep -v Database
However, this removes any databases with "Database" in their name from the list.
*(from redmine: created on 2007-06-15, closed on 2007-11-24)*