390 What is a 'rollback'? What is a 'rollback'? this post this post 390 What is a 'rollback'? 391 What is a 'rollback'? 390 What is a 'rollback'? What is a 'rollback'? meta.stackexchange.com/questions/17038/what-is-a-rollback 390 What is a 'rollback'? 390 What is a 'rollback'? rolled the edit back 390 What is a 'rollback'? What is a 'rollback'? 391 What is a 'rollback'? rollbacks What is a 'rollback'? What is a 'rollback'? What is a 'rollback'? rollbacks What is a 'rollback'? 391 What is a 'rollback'? What is a 'rollback'?