[XeTeX] Extra trailing space in IPA font with xltxtra

[Will Robertson]

On 2010-09-23 20:38:14 +0930, Paolo Matteucci 
<p.n.matteucci at gmail.com> said:

> Therefore *maybe", whatever approach is used to address this bug, the 
> same "fix" should be applied to fontspec, too...?

The \scantokens is somewhere in tipa.sty or its accompanying packages. 
But the problem only occurs if fontspec is loaded. I don't know why 
that would be, though, off the top of my head.

Sorry, I'm out of time tonight to look any further.

W