Well, I took aquaMat's remarks into account (now I forgot where they were. I can dig them up if you really want me to):
1) If you recklessly pulled some lever (in the Blue/Green Section) you could end up half-stuck with suicide as the only option*. This is no longer the case. The update was made for TDT Normal too.
2) In TDT Normal, there was a secret chamber in which frantic jumping aroung could result in Jack's falling through walls to his demise. The wall was made fool-proof. Amusingly, it had already been fixed in the Hard version :-?
(And maybe I confused Hard and Normal in Item 2 above. In any case the wall is now airtight - or rather, jacktight.)
*Allowing for a sacrifice might have been a deliberate feature in earlier versions, but I wouldn't do it anymore in a regular mansion (that is, without warning

).