=== 3.1 ===
+* The following functions, previously used (exclusively) by upgrade steps are not available
+ anymore because of the upgrade cleanup performed for this version. See MDL-51580 for more info:
+ - repository_picasa_admin_upgrade_notification()
+ - repository_googledocs_admin_upgrade_notification()
+ - repository_boxnet_admin_upgrade_notification()
+ - repository_alfresco_admin_security_key_notice()
+ * The prepare_file() function will now return a file in a per-request directory which will
+ be automatically cleaned at the end of the request.
+ No modifications should be required as a result of this change.
=== 2.8 ===
