So from the description rogues can sneak attack corporeal undead and constructs now, right? Does the same change affect what is subject to critical hits?
I think every creature that used to have blanket immunity will now need a specific entry on whether or not SA works for them (undead, constructs, etc..) since it seems that some will be immune while others won't, without a hard-line rule on which is which.
From the designer's note it looks like elementals will still retain full immunity, but only some undead will.
-S