Yes I have a "reply list" button, but this is the only list I'm on where I have to use it. I have gotten into the habit of just hitting "reply". So I sometimes accidentally reply to the poster instead of the list.
FWIW, Opera's excellent mail client sets "Reply to list" as the default action for this list - "reply to sender" is available via the drop-down options :)
No need to think, for me! Anthony -- www.fonant.com - Quality web sites