Read original post by Daniel Rubino at WPCentral
According to Neowin, Microsoft has begun pushing out Windows Phone 7740. Current "Mango" release is of course 7720 making this a minor but still interesting update to the OS. Not to mention a completely unexpected and unannounced OS update. According to the changelog, it fixes two issues
- Exchange 2003 email support -- an issue we first reported and verified here at WPCentral
- Voicemail notification issues