The wonderfull Pages Search Function has two different errors in the result page:

Piwik Action 1: Click to "Actions" => "Pages" => Enter Searchterm (with Results)
=> Results = OK;
Error 1: Errormessages: No data in this category. Try to "Include all population". (see: Screenshot 1)

Piwik Action 2: Click on "Open Row Evolution"
=> First Graph = OK;
Error 2: Second Graph (and after 2nd) : "No Data" (see: Screenshot 2)

Example:
Open: http://demo.piwik.org/index.php?module=CoreHome&action=index&idSite=3&period=week&date=today#/module=Actions&action=menuGetPageUrls&idSite=3&period=week&date=2014-08-15

1. Searchterm: "Drums"
2. Click on "Open Row Evolution"

ToDo:

1. Please remove the Lines with "Errormessage: No data in this category. Try to Include all population".
2. Please Fix "Open Row Evolution"