Version 2.8.1 of the iOS SDK has been released. You can find it here: https://tokbox.com/developer/sdks/ios/
New features and changes
This version fixes an audio-video synchronization issue in version 2.8.0.
Note that we have added TLS support added to OpenTok TURN servers. This fixes media streaming for clients behind network firewalls that block non-TLS traffic over port 443.
If you encounter any issues, please don't hesitate to send us a support query at email@example.com.