Dragging an dropping contacts from the address book into the to, cc, bc boxes when composing a message used to work but from last week most drag and drops fail. The email address will typically become both duplicated and muddled. My work around is to edit and the corrupt entry in the to, cc, bc field but this is very slow. I use 25 contact lists and cannot remember most of the contacts so I find that drag and drop is the only practical method of addressing emails, it used to work perfectly.