Wikimedia Bugzilla is closed!

I'm a editor of the German wikipedia. On the english WP you normally write a
  between value and unit symbol; In our typography it's common to have a
thin space in those cases. On computer this would be the "NARROW NO-BREAK SPACE"
(U+202F). But you can't write   or   in a wiki. Construcions like
these are cut out of by the software.
The only solution is to write an UTF-8 character. But then other editors just
see a space and don't understand.