When the news of the 8107 update for Windows Phone 7 appears I was pretty excited about a solution for the disappearing keyboard problem.
Now however Chris Walshie has found there may be a much more significant fix included with the update. He found the package contains patches also for the SMS module and contacts in the Windows Phone 7 OS. Windows Phone 7 was recently revealed to be vulnerable to a messaging bug where a specially crafted message, either via SMS or Windows Live Messenger/ Facebook could reboot the phone and then deny further access to the Messaging hub, which could only be fixed by a hard reset, which would lose SMS messages and other app data which could not be backed up.
While this is no proof (I guess we will have to wait for either Microsoft or the developer of the DOS hack to verify this) I cant imagine Microsoft releasing an OS update without fixing this serious issue first.
Update: Tom Warren has directly confirmed that it does not fix the issue. I guess we are due another one soon then?