I just had the nerve to play minecraft, and when I went to the title screen, I couldn't find the cursor.
How to reproduce
THIS WILL NOT WORK WITH MAC!
1. Right click the desktop background
2. Select Personalize
3. Click Change mouse pointers
4. Change to the Pointer Options tab
5. Tick Display Pointer Trails.
6. Click Apply, then OK.
7. Open Minecraft
8. Press F11 or the key you use to make Minecraft full screen