For a while now I’ve been noticing that certain songs’ ID3 tags are broken when played on my Android phone. I use Black Player which in turn uses the built in Android music libraries – but I’ve checked in a number of other players too just in case and the problem persists.
My music library is extremely multilingual (and most of those languages I don’t even speak), so it’s full of UTF characters. Some of them seem to break Android’s encoding recognition. Sadly some of these triggers are pretty common, resulting in borked last.fm scrobbles. (And of course last.fm can’t be expected to be so smart as to fix all those automatically.)