An edited and renamed image in the left folder (using echo synchronisation) - is listed in the preview window as "rename" with "bytes to copy" showing zero.
But running the sync does the correct thing - i.e. the old file is deleted and the new one is copied.
I've tried this a few times and the problem occurs each time - I'm just using mspaint to simply modify a small .bmp file and then renaming the file in windows explorer.