In some cases, this issue can be resolved by turning off the "Show preview rectangle when zoomed out" option in the Universal Access access pane of System Preferences (under Zoom > Options). D-B >Subject: [Cube] Misterious Black square around my cursor > >I installed the latest OS update to my cube (10.4.8), and I got this >thick black box around my cursor. I thought that it might be some >accumulated OS corruption, so I did a clean install of OS 10.4, and the >box went away, I then ran the update and it's back again. I also have a >Mac Powerbook G4, and I ran the update there with no problems at all. > >Anybody have any clues what this might be?