http://trac.webkit.org/changeset/84296 http://build.webkit.org/results/Windows%207%20Release%20(WebKit2%20Tests)/r84362%20(5734)/results.html http://build.webkit.org/results/SnowLeopard%20Intel%20Release%20(WebKit2%20Tests)/r84295%20(10862)/results.html http://build.webkit.org/results/SnowLeopard%20Intel%20Release%20(WebKit2%20Tests)/r84297%20(10863)/results.html From the output, it looks like WKTR doesn’t have layoutTestController.overridePreference implemented yet.
*** This bug has been marked as a duplicate of bug 42197 ***