I face a mystery.
Directory Opus is one file manager that I use.
Periodically I notice a change in its display of drive icons (I refer to the appearance,
not the difference in drive letters).
Sometimes they appear like this:
At other times like this:
These displays switch from time to time, but I can't see what causes it.
I'm not even sure that the phenomenon is limited to Directory Opus or if that's the only place I happen to have noticed it.