One is that the earth's cloud texture is rendered as bands around the planet like those on gas giants. Maybe Celestia is trying to tell us something?
Also, the orbital fix isn't perfect. The moon's orbit in pre4 becomes extremely eccentric with one end inside the earth and the moon's motion istill seems to be somewhat discontinuous. It becomes apparent, too, that Celestia isn't designed to handle interpenetrating objects.
Cloud, orbital and collision problems are shown at this "favorites" location:
"moon-in-earth" {
isFolder false
parentFolder ""
base [ 0.003256558949464714 1.496065388143964e-009 -1.471924407981308e-005 ]
offset [ 2.257301333699613e-013 5.421010862427522e-020 5.701277124015025e-016 ]
axis [ 0.450506 0.771601 0.449083 ]
angle 3.0952
time 61470462403.45435
selection ""
coordsys "ecliptical"
}