Hi guys
Yahoo has been misbehaving again. If you want to
complain to them, you will need to have the full
"header" information that each email comes with. This
shows which router received the email / when and
therefore how it got to you.
To ensure that you get this information you need to
switch headers on (or at least i did). In your yahoo
account, go "options" then "general preferences".
Look around and you should see a radio button to
display "full headers".
If you download your emails to outlook express, the
header information is still there. If you rightclick
and then look for properties, details you should see
it all.
Hope this helps you make your point to yahoo. What
brought it to a head for me was getting my turn 72
hours after deadline. And this was a POWER game with
only 96 hours between turns 
Cheers
Mike