Hello Bryan,

while writing http://commons.wikimedia.org/wiki/User:Rillke/AxUserMsg.js
I got an error testing this on my discussion page, which is a redirect (and only if it is a redirect; Error: sometimes 500, then 502).

I am to lazy to seek the source code (and I do not understand PHP). 5xx indicate an internal error. But I am not a professional JS-scripter and therefore there is the possibility that I did something wrong.

Yours sincerely
Rainer Rillke

Here are the details:
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Request-Header
Host	commons.wikimedia.org
User-Agent	Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1
Accept	application/json, text/javascript, */*
Accept-Language	de
Accept-Encoding	gzip, deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	115
Connection	keep-alive
Content-Type	application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With	XMLHttpRequest
Referer	http://commons.wikimedia.org/wiki/User:Rillke
Content-Length	254
Cookie	commonswiki_session=<removed for security>; commonswiki_language_js=de; popTz=0; vector-nav-p-tb=true; centralauth_LoggedOut=20110525164806; commonswikiLoggedOut=20110525164806; commonswikiUserName=RillkeBot; wikiEditor-0-booklet-Edittools-page=Edittools1; centralauth_User=Rillke; centralauth_Session=<removed for security>


Response-Header
Date	Wed, 25 May 2011 17:01:39 GMT
Server	Apache
Cache-Control	no-cache
Vary	Accept-Encoding
Content-Length	49984
Content-Type	application/json; charset=utf-8
X-Cache	MISS from sq34.wikimedia.org, MISS from knsq30.knams.wikimedia.org, MISS from knsq30.knams.wikimedia.org
X-Cache-Lookup	MISS from sq34.wikimedia.org:3128, MISS from knsq30.knams.wikimedia.org:3128, MISS from knsq30.knams.wikimedia.org:80
Connection	close


Parameterapplication/x-www-form-urlencoded
action	edit
appendtext	{{subst:Test}} -- ~~~~
format	json
redirect	
summary	Adding [[Template:Test|Test]] for notification purposes.
title	User talk:Rillke
token	<removed for security>
watchlist	preferences
Quelle
action=edit&summary=Adding+%5B%5BTemplate%3ATest%7CTest%5D%5D+for+notification+purposes.&watchlist=preferences&title=User+talk%3ARillke&token=<removed for security>&redirect=&appendtext=%0A%7B%7Bsubst%3ATest%7D%7D%0A--+~~~~%0A&format=json


500: PHP fatal error in /usr/local/apache/common-local/php-1.17/includes/json/Services_JSON.php line 497: 
Object of class Services_JSON_Error could not be converted to string 

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Request-Header
Host	commons.wikimedia.org
User-Agent	Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1
Accept	application/json, text/javascript, */*
Accept-Language	de
Accept-Encoding	gzip, deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	115
Connection	keep-alive
Content-Type	application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With	XMLHttpRequest
Referer	http://commons.wikimedia.org/wiki/User:Rillke
Content-Length	254
Cookie	commonswiki_session=<removed for security>; commonswiki_language_js=de; popTz=0; vector-nav-p-tb=true; centralauth_LoggedOut=20110525164806; commonswikiLoggedOut=20110525164806; commonswikiUserName=RillkeBot; wikiEditor-0-booklet-Edittools-page=Edittools1; centralauth_User=Rillke; centralauth_Session=<removed for security>


Response-Header
Server	squid/2.7.STABLE9
Date	Wed, 25 May 2011 17:09:58 GMT
Content-Type	text/html
Content-Length	3023
X-Squid-Error	ERR_ZERO_SIZE_OBJECT 0
X-Cache	MISS from sq34.wikimedia.org, MISS from knsq30.knams.wikimedia.org, MISS from amssq32.esams.wikimedia.org
X-Cache-Lookup	MISS from sq34.wikimedia.org:3128, MISS from knsq30.knams.wikimedia.org:3128, MISS from amssq32.esams.wikimedia.org:80
Connection	close


Parameter  application/x-www-form-urlencoded
action	edit
appendtext	{{subst:Test}} -- ~~~~
format	json
redirect	
summary	Adding [[Template:Test|Test]] for notification purposes.
title	User talk:Rillke
token	<removed for security>
watchlist	preferences
Quelle
action=edit&summary=Adding+%5B%5BTemplate%3ATest%7CTest%5D%5D+for+notification+purposes.&watchlist=preferences&title=User+talk%3ARillke&token=<removed for security>&redirect=&appendtext=%0A%7B%7Bsubst%3ATest%7D%7D%0A--+~~~~%0A&format=json


502: Request: POST http://commons.wikimedia.org/w/api.php, from 91.198.174.40 via sq34.wikimedia.org (squid/2.7.STABLE9) to 10.2.1.22 (10.2.1.22)
Error: ERR_ZERO_SIZE_OBJECT, errno [No Error] at Wed, 25 May 2011 17:09:58 GMT 

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