Last modified: 2012-09-22 17:08:39 UTC
See example URL; it's the same with proofread, some other groups work. Reported on [[translatewiki:Thread:Support/About Special:Translate]].
Fixed. Thanks for the report.
Now the URL doesn't even load; same for the plain Special:Translate or LanguageStats, unless you specify a group other than mediawiki extensions.
Insufficient information. Works for me. Might be caused by syntax errors I saw in error log.