Meshes rendered with wrong orientation
Looks like they are turned by either 90 or 180 degree around the Morrowind Z-axis. Most Dwemer Ruins and Ancestral Tombs are affected by this bug, but it probably can be seen in other places too.
Comment from Nico:
It can also be seen in floating crates here and there, and in other interior static objects.
The bug is caused by erroneous info in the first (root) node of the NIF file. You are obviously supposed to discard the transformation of this node, which we did in the old D version. However this made similar errors crop up in other meshes. Perhaps there is a flag in the NIFs that we have missed...
(RM-1 from redmine: created on 2011-08-06 by Lukasz Gromanowski, , closed on 2012-03-24 by Roman Melnik)