i had XXX lock up on me today, and also after setting up s2u2 to only lock when the phone goes into standby (or turns off, whatever) i had it kinda freaking out one me. when i would unlock it, it would have the bottom slider halfway hidden underneath thebottom curtain. sliding the keyboard out and closing it fixed that. Also once, i was using just WiFi and when i went out of range and back into it, it asked me to connect to the WiFi connection, i selected it and then the phone locked up completely, soft reset got it back going.
Switching to XDarkRoot as we speak until this new release happens