So the subject of this thread happened to me twice in quick succession - once a little bit ago, when I just saw a little piece of metal coming out of my stylus slot a little bit into it. I preceded to sorta *push* it back into the stylus slot wall with the stylus. Then today it came out again, and after a little it of fiddling, something broke off, rattled a little bit, and then fell out - little bit of plastic, a little over a square millimeter in size.

Anyway, some metal rattled around in there for a while too - eventually I was able to prod things in with the stylus itself so that now the last two-three millimeters of stylus-into-slot insertion are really tight.

Not sure if it's the same piece that broke, but I was really happy to see this thread and know that it wasn't something major-concern-causing. (Phone still rebooted fine once during this process, but I wasn't quite certain it being okay was actually a long-term okay-ness.