I have had one of the original TiBook since they were first introduced. I would say that the screen marks on the screen ARE due to finger grease transferred from the keyboard. However, if left, the grease will etch the soft glass used on the screen leaving permanent marks - in the worst case pits on the screen surface. If you see marks, clean them off immediately - but don't use solvents -- Dr Doug Edwards email: doug at cs.man.ac.uk Dept of Computer Science Tel: +44 161 275 6191 University of Manchester Fax: +44 161 275 6204 Oxford Road, M13 9PL UK