Results were narrowed to related to Nimi Web Cleanser. Disable filtering to display all events.
Build 20150301 of Nimi Web Cleanser fixes internal (pages not being revealed) and ignored requests handling.
Build 20150216 of Nimi Web Cleanser adds support for images with source defined through data-src attribute, which previously could be detected as false positive.
Secondly, it revises element size checking.
Actuall number of events my vary. Historical data (before year 2010) might not be available for browsing.