I told from the beggining that the Built In player would NOT support Subtitles... if you want subtitles you must use MPC or you're on your own..
I'll look into the launch screen image.. I probably forgot a line of code there..
The Visualization should NOT flicker in the latest versions.. if you have this going, then you probably don't have the latest version. The new versions completely hide the audio player while in full screen, so there's no chance of this happening.