[XeTeX] Problem with footnotes and xltxtra

[Will Robertson]

On 2010-09-30 18:13:50 +0930, Dominik Wujastyk 
<wujastyk at gmail.com> said:

> A quick trial of this shows that the problem goes away when the "no-sscript"
> argument is removed from xltxtra (and the "minimal" class is replaced by
> "article" to get the \footnotesize command).
> 
> Next thing to do (not by me) is debug [no-sscript].

Strange.
I suspect that if you're loading xltxtra with the [no-script] option, 
then you no longer need xltxtra. I recommend, now, just

    \usepackage{fontspec}

instead -- it will automatically load xunicode if you have the fontspec 
v2.1 or later floating around (2.1b is new to CTAN). You can load the 
realscripts package if you want the features provided by xltxtra for 
OpenType superscript symbols in footnotes.

In terms of debugging the problem, I haven't worked out what causes the 
error but I know how to fix it. There seems to be a strange interaction 
with \DeclareRobustCommand and the xparse package which we'll need to 
sort out.

Cheers,
Will