Should you find yourself catting files together to make a megafile (like turning many individual sproc files into a single file fit for execution) and you end up with your program (let’s say SQL Management Studio) saying there’s a problem with the file its because a Unicode BOM (byte order mark or char value 65279) that appeared at the start of one of the concatenated files made it into your megafile.  We solved this by opening the offending file in Visual Studio and Save As… overwriting itself as a Unicode Codepage 1200 instead of UTF-8.