lokesh/lightbox2 — pull request #174 by mikealmond (2014-02-12 03:59:37+00:00)
Title: Fix double HTTP request because of an empty img:src attribute

Some older browsers perform a second HTTP request to the window’s location when an empty img:src attribute is encountered. This causes some performance issues and can lead to unwanted code execution. Adding a small data URI fixes this issue for older versions of Safari and Firefox (and perhaps IE)