For those of you that didn't know their was a maintenance release for the HTC EVO 3D on 7/7/2011. Below are the highlights. You can get instructions for updating your phone here.

This software update available for your HTC EVO 3D provides key enhancements:

HTC Watch (New)
HTC Watch (Update)
HTC LockScreen (Restart Required)
HTC Widget (Restart Required)

Before you proceed, please confirm that this software update for the Watch application, HTC LockScreen and HTC Widget you have software version 1.13.651.7 installed on your EVO 3D. Navigate to the Home screen then tap Menu > Settings > About phone > Software Information and locate the Software number. If your Software number is less than 1.13.651.7, you will need to update to 1.13.651.7 first before completing this update.

WARNING: During the upgrade process the device will reboot multiple times and show software upgrade screens. Do not remove the battery as this will stop the update and your device may be rendered inoperable!
  • This update fixes issue of calendar entries in certain formats force closing during edits
Before you proceed, please confirm that this software upgrade (to 1.13.651.7) is a newer version than what is currently loaded on your device. If it is the same version, there is no need to reload the software. Navigate to the Home screen then tap Menu > Settings > About phone > Software Information and locate the Software number. If your Software number is less than 1.13.651.7, you should proceed with the upgrade.