I upgraded my Paperwhite to 5.3.3 yesterday. Screensaver stopped working.
I reinstalled it but it still wouldn't change from stock.
Had to uninstall and reinstall it before it would work.
Just in case that helps anyone else in future.
I forgot to mention backup your screensavers as this wiped them for me.
Thankfully I backed them up before trying it.
Last edited by Akirainblack; 01-22-2013 at 10:08 AM.
Reason: Forgot to mention to backup.