i dont use yahoo but try deleting all the mail you read this way it will just send u to only unread mail. after you read it doesnt it go to a different folder instead of staying with all your new mail? see if u can do this. i dont feel like creating a yahoo account to check right now so if u cant fix the problem use hotmail it takes like 2 mins to make an account. if not ill look into it later (but someone might of helped u by then =P) good luck.