bug#3640: I can't see all characters in my files anymore

Help, I'm now shipping files to people with all kinds of embedded junk
in them like
|        character: ‎ (8206, #o20016, #x200e)
|preferred charset: unicode (Unicode (ISO10646))
|       code point: 0x200E
|           syntax: . 	which means: punctuation
|      buffer code: #xE2 #x80 #x8E
|        file code: #xE2 #x80 #x8E (encoded by coding system utf-8-unix)
|          display: by this font (glyph code)
|    xft:-unknown-FreeSans-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x8F1)
|
|Character code properties: customize what to show
|  name: LEFT-TO-RIGHT MARK
|  general-category: Cf (Other, Format)
all because I can't see them anymore now that I use emacs23.
I'm like a kid using MicroSoft. I can't see exactly what is in my files
anymore. I can't find the switch to turn it back off.