Supersite for Windows reports that Microsoft has released an update for Windows Phone 8.1 Update 1 to Developer Program Members
If you've been using the Windows Phone Developer Program to keep your phone up-to-date with the very latest in Windows Phone OS releases, you're used to the fact that Microsoft frequently updates the OS to a newer version. Likewise, you're used to the fact that many of these updates are undocumented and don't appear to change a thing. So that just happened.Windows Phone 8.1 Update 1 is Updated for Developer Program Members
To be more specific: If you have installed Windows Phone 8.1 Update 1 to your Windows Phone handset using the instructions I provided in Get Windows Phone 8.1 Update 1 Now, there is an update available now. This update will bump the OS version number to 8.10.14157.200.