This the response I got from Yahoo! support - as you can see they are not even acknowledging the problem.
"Thank you for writing to Yahoo! Mobile Tech support.
I understand that the push feature in your iPhone is not working.
My deepest apologies for the inconvenience this may have brought you.
If you are looking for assistance regarding your Yahoo! features in the
Apple iPhone, please contact Apple Care at:
- URL: www.apple.com/support/iphone or
- Phone: 1-800-MY-IPHONE or
- go to www.apple.com/iphone for more information.
In case you continue to experience this event after contacting Apple
care, please feel free to contact us back. We will be happy to assist
you again, your satisfaction is our priority.
Regards,
William
Yahoo! Mobile Tech Team