The other day we saw an update for Photosynth for Windows Phone get pushed out taking the app to version 1.1. We didn't know what all the update involved but today we are being told the update is mandatory or the app will stop working after June 20th.
Apparently the update was necessary to correct an oversight with the original version that was released about a month ago. Version 1.0 was released with a safety feature designed for beta tests that calls for the app to expire automatically within 30 days. Anyone running version 1.0 of Photosynth after June 20th will receive a "application expired" message and the app will shut down automatically. So, if you've been putting off the update to version 1.1 now is the time to update your copy of Photosynth.
If you haven't installed Photosynth to your Windows Phone, it's a free app that you can find here at the Windows Phone Marketplace.
Source: Photosynth Blog