1.1 introduced a new bug, which may cause the execution of actions even if the conditions weren't matched. Because of this, there is this early 1.3 release, which fixes the bug.
Note that there is no 1.2 release because of troubles creating it: http://drupal.org/node/192422
So 1.3 follows 1.1.
There are still issues with the rollout module, particularly when a form redirects a user to another page on submitting. Please test the module, and post any issues to the modules home page.