Palyons informed us of a new version of Chilly Willy's Keycleaner. For those who haven't heard of it, Keycleaner is an application used to check the contents of the keys in your IdStorage and dump them if necessary. Here's the basic description of the app given by Chilly Willy:

A new, easy to use app to show the state of the IdStorage in your PSP, and make corrections to common problems caused by the old downgraders (TA-082/86 only). Will dump keys as well.

The new version, known as Keycleaner v1.1, adds cleanups functions and support for PSPs in different regions.

As always, make sure you check the readme for more information on using and installing Keycleaner to your PSP. Remember that you don't really need to use an app like Keycleaner unless you modified more than one key to get 1.5 running on TA-082/86 PSPs, and even then, you should use the app with caution.