In addition to some of the other problems occurring with saving -
Working on a 160Mb single mesh file, I noticed it was taking a very long time to save. So I created a V5 copy of the file, and checked:
Saving the file in V5 took 27 seconds
Saving the file in V6 took 90 seconds.
Both files saved to the desktop, no special folders.
V6 version (6.0.17351.16331, 17-12-17) (daily build loaded this morning)
Copying the file to the clipboard also took a heck of a long time.
Other funny thing -
The V6 file registers as around 158 Mb on the desktop.
The V5 version registers as around 325Mb for the same object.
Audit3dmFile confirms the sizes (and the difference) in the object table
So, don’t know what’s going on here with the file size difference, but that seems to mean that V6 is not just 3x slower, but actually 6x slower at saving than V5…