3
hervet: that's what he's saying: to 2.0.10 , from 2.0.9.2
you'll have to 'update' the system module in the system admin, modules page, as all custom blocks will not work when upgrading from < 2.0.10 to >2.0.10. this because the custom blocks now use a dummy template, which isn't there if you haven't 'updated' the system module properly.
herko