Sorry, we no longer support v2.x.x. You can ask for help on the mailing list though; see the README for a link.

To avoid raising a duplicate issue I will reply this one directly. The problem still exists in 3.0.
I've updated a new revision of this gist by using twitter-bootstrap 3.0. And the problem still remains.
Please check it again.

Please remove the docs CSS and upgrade the example to a JS Bin or JSFiddle.

Done. Here's the example on JS Bin: http://jsbin.com/evETOjA/6/edit?html,output

Confirm came across this too, with Thai character

Is this all due to https://github.com/twbs/bootstrap/blob/master/js/scrollspy.js#L61 : var $href = /^#\w/.test(href) && $(href) ? That is, \w won't match Chinese or other characters.

Thanks @ianb , it should be that reason! I have fixed it by extending the regexp so as to match Chinese and other characters and that works!

var $href = /^#[\u2e80-\u9fff\w]/.test(href) && $(href)

@boulox , please check whether Thai characters also works.

hm… yeah this was written with the old html4 stuff in mind http://www.w3.org/TR/html4/types.html#type-id

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

looks like html5 is much more chill with diff chars in id's tho http://mathiasbynens.be/notes/html5-id-class

i'll push a fix in the next few min