Notepad++ v6.3 (UNICODE)
When doing a conversion of a WRITE-PROTECTED file from ANSI to UTF-8 (including BOM) only the BOM will be added to the file begin but the non-ASCII characters (> 7 bits) are not changed at all. The result is a invalid file content.
Everything works fine if the file is not write-protected.
It should be checked what happens when converting a WRITE-PROTECTED file from any format to any other format.