If a Confluence page has file attachments with Japanese file names and you click on them one-by-one, they get downloaded to the local disk and the Japanese file name is preserved (except that spaces " " get replaced by a "+" see CONF-4503). However, if you click on "download all", the file names of the downloaded files are corrupted on the local disk. Please see screenshots attached. I was able to replicate this problem on Windows using IE browser (worked fine on Mac Safari). I think this could be an issue for many of our Japanese customers.