I have an old Jira 3.12 installed on Linux (Debian, 6.0.4). The encoding in OS is setup to UTF-8.
My problem: if somebody adds an attachment with non-ASCII symbols in its filename, it is created correctly - correct record in the database and a correct filename in the file system. But after various time, some filenames are being broken - non-ASCII characters are replaced by ‘?’ symbols, but the “Date of change” attribute is not updated, and changes are not made to database.
What can be the reason of such problem?