Thread:Captain Comet/@comment-5101605-20120604170921/@comment-5101605-20120604173237

I foudn out what it means and what it is used for. NBSP stands for Non-Breaking SPace and it is supposed to prevent breaking across lines. And here is how it is used.
 * Turns out that the single-line problem can be avoided if you use the alternative way to set titles with the header tags (title).
 * NBSP, if used in the title="title", forces the tabs to display in a single line. If used in the title, it becomes literally displayed as &nbsp, so still unusable.