By now, it's no secret that the data problems some Windows Phone users were experience was the result of Yahoo! email sucking the life out of your data. Yahoo! has apologized for the problem and is working with Microsoft on a fix.  However, in an effort some see as deflecting the blame, Yahoo! released the following statement,

"The issue on the Windows Phones is specific to how Microsoft chose to implement IMAP for Yahoo! Mail and does not impact Yahoo! Mail on these other mobile devices. Yahoo! has offered to provide Microsoft a near-term solution for the implementation they chose, and is encouraging Microsoft to change to a standard way of integrating with Yahoo! Mail, which would result in a permanent fix."

Well... it now appears that this problem isn't as exclusive to Windows Phone 7 as Yahoo! would hope. Within Windows programmer Rafael Rivera, who helped identify the initial problem, has done further testing to see if the problem existed on other platforms.  Rivera  discovered that the standard IMAP protocol Yahoo! that is used with the iPhone (the protocol Yahoo! feels Microsoft should use) also returns excess data.

So much for Windows Phone 7 exclusivity.

Source: WithinWindows  Via: BGR