Hi Henri, I did more testing and found a couple things.
First, the details of the issue is different then I initially reported... dang it...
I am seeing the permissions getting automatically set to copy/mod/no-trans, but it happens after editing and saving the day-cycle, (transfer of the object has nothing to do with it, sorry, I need to stop doing this stuff at 3am).
I can trigger this behavior by extracting the "Layered Clouds" texture from the LL library into a non-library folder, and then dropping it into the 50% ground level keyframe, adjusting cloud density to 0.8, and saving. Changing either element alone did not seem to be a consistant way of invoking the behavior.
Second, this particular behavior does not occur on the standard LL viewer, (object remains full perm).
Finally, I created a New-Sky in Cool, and did not see this behavior, it remained full-perm.
Hopefully this is more a more useful description of what i am seeing
Thanks again Henri!