luceos Yes but will prevent unwanted content to some degree. Of course, if someone will try to fake it you won't stop him, however, normal users may try to upload some files without faking it, and if it won't be allowed they just won't. While currently, you don't have even the option to try to prevent such actions.
Actually, the problem lies in MIME itself as image/jpg is narrow and explicit while application/octet-stream can basically everything.
