[leakybucket]

I had a 'rattling' issue, but mine correlated with moving my head. If I held very still, the sound was fine. This didn't happen at first, it developed over time. I wondered if the issue was either loose/dirty silcone tips, even though I was wearing the best fitting size (and they passed the ios ear tip test). Cleaning the tips didn't make a difference.

So I bought some new foam tips from www.complyfoam.com , and to my pleasant surprise, the rattling stopped.

Not sure if this is different from the vast number of other reports, but fyi.