Byte Order Mark
ByteOrderMark is a global setting in Sandboxie Ini. It is typically specified as ByteOrderMark=yes (see Yes Or No Settings), and indicates that Sandboxie Control should insert a UTF-16 UNICODE Byte Order Mark (BOM) character at the top of the configuration file.
. . . [GlobalSettings] ByteOrderMark=yes
This setting must be edited into Sandboxie Ini, then Sandboxie configuration must be manually reloaded. Following this, the next time Sandboxie Control rewrites the configuration, it will insert the UNICODE BOM character into the very first two bytes in the Sandboxie Ini configuration file, thus: (hex.) FF FE.
You need only bother with this setting if both these statements are true: