I have just released a new version of WP Caretaker, version 1.03

This fixes a bug that on some server configurations resulted in a Fatal Error when you tried to activate the plugin.

This version also introduces a couple of other fixes under the hood, and it has been verified working fine with the spanking new WordPress 3.5.

Go take a look here, and if you already have a license you can download the new update via normal WordPress plugin update system or from your purchase history page.