I followed up someone else’s post about this in the General Discussion forum before I realized I should have put it here.
The duplicate ghost image appears below and to the right of the image being moved by the cursor. Everything works properly otherwise, even though it is distracting. I saw an old post about a similar problem from some time ago that suggested this might be a Java issue, but I can’t be sure.
I have the newest version of Java as of January 2021 and am using Vassal 3.4.12 on Windows 10.
Thanks in advance for any ideas you might have.