Some of Ghosthande's breeds, such as the Sabertooth Norns, can get pretty big. Also, some of Norngirl's breeds, such as the Cave Norns to DS, CA norns to DS can be bigger.My TCR Norns Just sent something to the CCSF...
-Malkin
I haven't used these metarooms for a while, for this beta test or otherwise, but I do remember the hallway in Daedalus having a similar issue with a low roof. For a tall example that can happen even with just the official breeds, there's grendels that happen to have norn bodies. That's what alerted me to the above issue last time I used Daedalus.
-Grendel Man
http://creaturescaves.com/forum.php?view=12&thread=6830