Why the downgrade to 1.03.10 is not recommended?

Community Archives WD TV Live Streaming Firmware
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I’ve downgraded to 1.03.10 and the only thing I see is that the “Match Framerate” option is missing. So now I’m back on 1.06 firmware. But this is also a no go for me. Video_ts or video-iso stutter every 20-25 minutes for a couple seconds and there’s no way I can play the “Bird scene” stutterfree. I play al media from usb2 and usb3 external hd’s.