Can you please provide more details
of course

how can we reproduce the problem
go to e.g. http://wiki.contextgarden.net/Quotes and click on a command link, e.g.
single quotes
\quote{some text}
in the wiki, the fake link on \quote is a real one, calling javascript:show_command('quote') on click.

and where is that function?
the function can be found in http://wiki.contextgarden.net/index.php?title=-&action=raw&smaxage=0&gen=js&useskin=monobook&270, which is loaded in the head of each contextgarden wiki page.

and as said, the problem is that
@texshow:
the resonse header contains the following lines:
HTTP/1.1 302 Found
Server: Apache/2.2.9 (Ubuntu) DAV/2 SVN/1.5.1 PHP/5.2.6-2ubuntu4.6 with Suhosin-Patch Phusion_Passenger/2.2.4
Location: http://wiki.contextgarden.net/Category:Reference/en
so the apache webapp is misconfigured.

Thank you,
   Mojca
thank you for listening :D

(texshow used to be a separate application; it is now part of wiki)
 i kinda figured that ;)