Preserve &nbsp in title
You can use these two modules:

Title


  Do as follow:
  In content type field management, use replace button to turn title core into a text field; set up the field to be in a full html text format;
  In content type display management, show new title field;
  In file node.tpl do not print the core $title;


HTML Title


  It let you insert some sort of BBcode into the title. I've never used it and I don't know if there is a BBtag for &nbsp;