Unwakeable 1.5 was built from the ground up using K2 r687 as a starting point. I decided to start fresh for Unwakeable 1.5 and scrapped pretty much all the code from 1.2.1. Unwakeable still has all the features it had in previous versions.
Advanced navigation and live search now work in Unwakeable. Unwakeable also comes with the K2 Sidebar Manager, a superior alternative to WordPress widets. You can enable the K2 Sidebar Manager or you can use WordPress widgets, either one will work. Or, if you don’t like sidebar managers, you can continue to modify the contents of sidebar.php to get the sidebar setup you desire.
You can download Unwakeable 1.5 from the official Unwakeable page. Please let me know of any bugs or problems you run into.