I'm creating the german language files for this and now I got everytime an error if i open "Referers" -> "Evolution"
Uncaught exception: 'Action showInContext not found in the controller Piwik_Referers_Controller.'
Are you using the latest SVN version?
sth must be wrong with your current sources of Piwik
showInContext action is called only in Home module which loads other modules,
it seems that you called link like:
but we do not generate such link:)
the proper url in this case is (module=Home instead of module=Referers):
Assuming this will work with latest piwik version.