Symptom: Multiple .conflict files/folders happening on foreign characters
Since: v2.3.3 (prior to 2.3.x did not had this issue)
Similar to accented characters, Korean characters also seems to confuse BTSync between OSX & Windows.
There had been some quirks between their foreign character compositions since decades ago regardless of BTSync. OSX saves "안녕하세요 (5 letters)" as "ㅇㅏㄴㄴㅕㅇㅎㅏㅅㅔㅇㅛ (12 separated consonants)" in a nutshell and then display it as final composition: "안녕하세요(back to 5 letters)", while Windows simply saves "안녕하세요" as "안녕하세요(5 characters)". :-S
So in theory, a folder named "한글" may exist multiple times, while seemingly identical. "한글" / "ㅎㅏㄴㄱㅡㄹ" / "한ㄱㅡㄹ( in theory ;p )"...
Hope this would help you support folks pin down the issue.