Thanks for that Neil, very useful.
Also, one of the resizing programs used on this board has a built in sharpen feature, that needs to be deactiviated before resizing which may have been the program Hilary used...not sure. Can't think of the name at the moment, but I've seen this oversharpened edge (visible on the original when zoomed in) effect occur when this feature has been used by other postees. It's a bit of a nightmare really when restoring.
Caroline