When casting 'Shatter,' the associated spell message is "The dungeon rumbles.".
Obviously, in the halls of Pandemonium, the Abyss, or any of the Hells (tested: Vestibule, Gehenna), the message is inappropriate, unless of course these are considered to be part of the 'dungeon' as a whole. Instead, it would probably be better if the message was "The <name of current branch> rumbles." This would result in:
"The Abyss rumbles."
"The Lair of the Beasts rumbles."
etc.
-Jude
I like the current message for the overall dungeon (including Lair etc.), but I agree that for branches outside the dungeon (i.e. reached via portal) there should be a special case, sorta like Magic Mapping is handled differently according to level type.
Moving into FRs.