Problems with 4.1.5... Earlier versions available?

I seem to be reading quite a few complaints in the forum about video playback issues popping up when people have installed 4.1.5.

  1. Is there any notion about which revision introduced these problems and…
  2. are earlier revisions available for purchase?

My main purpose for buying ATV Flash would be to watch video_ts files streamed from my mac or usb hdd.

The performance issue is not specific to version 4.1.5, but should be addressed in an update that will be available soon.