+ * Folders: `sapphire/` moved to `framework/`, replace with `FRAMEWORK_DIR` (in PHP) or `$ModulePath(framework)` (in templates). Be sure to update `.htaccess` or `web.config` ([more](#sapphire-rename))
+ * Templates: `<% control %>` replaced by `<% loop %>` and `<% with %>` ([more](/reference/templates-upgrading-guide#control))
+ *`DataObjectSet` is replaced by `DataList`; beware that `DataList->remove()` will delete an entry from the database ([more](#deprecated-classes))
+ *`ComplexTableField` is replaced by `GridField`, which is similar to the `DataObjectManager` extension.
+ *`Director::redirect()` and `Director::redirectBack()` deprecated ([more] (#director-static-functions-deprecated-director-redirect-and-director-redirectback-in-particular)
+ * Changes in ORM, DataObject::get() deprecated ([more](#new-orm-datalist))