Hi sebneu - Thank you for your reply. Finally tracked my issue down to a picture file with a messed up modified date (came up as 2097 on linux and 1961 on windows!). Out of 14,000 files it was a bit of a needle in a haystack but all syncing happily now .
Hi sebneu - Do you get an answer to your issue? I'm having the same problem between my Linux NAS and Windows PC.