I don't think that my gapless problem cause by file. It doesn't work neither my own flac ripped (EAC) nor albums from hdtracks nor even chesky album that come with X3. And I play only in browse mode.
Anyhow, just an information for FiiO team, as I said in my early post, I can live with this and wait for next firmware.
I'm in happy mode, because of X3 and my new ATW-ESW11LTD seem to be a good match. Can't help to post a lovely golden "limited edition" here
Now that's a beautiful headphone!