New error in version 1.8.4

There is an error. Please report the message (Piwik 1.8.4) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Warning: htmlspecialchars() [function.htmlspecialchars]: Invalid multibyte sequence in argument in /is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/core/SmartyPlugins/modifier.escape.php on line 31

Backtrace -->
#0 Piwik_ErrorHandler(…) called at [:]#1 htmlspecialchars(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/core/SmartyPlugins/modifier.escape.php:31]#2 smarty_modifier_escape(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/tmp/templates_c/%%46^462^46227F0A%%visitorLog.tpl.php:350]#3 include(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/libs/Smarty/Smarty.class.php:1263]#4 Smarty->fetch(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/core/View.php:133]#5 Piwik_View->render(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/core/Controller.php:153]#6 Piwik_Controller->renderView(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/plugins/Live/Controller.php:84]#7 Piwik_Live_Controller->getVisitorLog(…) called at [:]#8 call_user_func_array(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/core/FrontController.php:138]#9 Piwik_FrontController->dispatch(…) called at [/is/htdocs/wp1174328_58W09RJU82/www/tracker-schuhshoe/index.php:53]

Thanks for the report. I added a note in this bug report: Warning: htmlspecialchars() Invalid multibyte sequence in argument in core/DataTable/Renderer.php on line 223 · Issue #3259 · matomo-org/matomo · GitHub

Thank you very much!
Werner