I have been experiencing an odd phenomenon in Ubuntu Unity (2D and 3D) with 11.04/11.10 and 12.04.
I have three monitors running on nVidia gpus (in Ubuntu 12.04, this configured itself with the restricted drivers and Xinerama), and when I select a file (or group of files) from a window, although the mouse continues to hover where I begin to drag, the icons of the dragged file(s) appear one screen to the left. This would be a non-issue if releasing them didn't move them to where ever they are hovering.
It's like Ubuntu is confused altogether which screen I am dragging from, since the positions correspond to the same location on a different monitor.
I pondered this a couple times in the past but haven't been able to google myself an answer (as I apparently can't describe this problem adequately to search), and now I have a fresh 12.04 (x64) install where this is again happening.
Thanks for your consideration in advance.