When I switched on my MacBook this morning I found that the entire desktop moves up and down and left and right (about 1/2 inch) when I use the mouse even though the button is not down (nothing selected); this is very annoying !! Can anyone suggest what the problem is and what can be done about it? Paul --- MUGLO information at <http://www.freewebs.com/muglo> Manage list subscription options at <//www.freelists.org/list/muglo>