+Nicolas Lucas, There is also an issue when inside an app with the device unlocked, a notification received during this event will bring you back to the lockscreen. This has happened consistently since the latest update.
+Koushik Dutta With the latest updates, I can no longer cast a mm.flv file from any of my devices to my Vizio Co-star.
When the app first became available from the Play Store I had no issues with casting. The devices includes a Nexus 7 2012 (stock unrooted), Samsung Galaxy S4 (stock) no root, and a rooted Asus Transformer TF101. All devices are running Android version 4.3 except the Nexus 7 which is running Kit Kat v. 4.4.