First, I took out an atilla the other day and it's head decided it would nod up and down rather fast before it died. Death animations are screwed, basically.
Second, the Core tunnels seem to be better now. NK1's custom RW ones are still a bit grey, but the tops on all the ones I've seen (by the pink tracks) seems to be a bit dark to me.
Thirly, I also had a rather interesting total crash the other day. In order:
1) Internal Exception
2) Runtime Error
3) Access Violation - Unable to load console font
Fixed by replacing data.pak with a duplicate from my 1.01 7z (thanks N1) so it may have got corrupted somehow. I didn't open it so I have no idea what caused it, it might be relevant.