Originally Posted by ixtab
Probably not. The MOBI8_DEBUG file is actually still evaluated, but long-pressing the corners does nothing. So they seem to have removed the fundamental bit of functionality.
Which is as good as Amazon printing a big warning on their site:
Kpw Jailbreak vector being removed from the 5.3.x firmware series.
Hint to the wise:
Don't let your Kpw auto-update to the next firmware release until we get our hands on it.