Have a look at the address :
http://excel2007.tips.net/Pages/T0135_Tab_Key_Doesn't_Move_from_Cell_to_Cell.html
HTH
Daniel

Excel 2007
It used to be the case I could move the curser using arrow keys, this is no
longer the case, I have to select a cell with the mouse.
What setting have inadvertently changed?
T/Y