(This is split out from bug 58990.)
compositing/iframes/invisible-nested-iframe-show.html has been failing on SnowLeopard Intel Release (WebKit2 Tests) since it was added in r84307. See <http://build.webkit.org/old-results/SnowLeopard%20Intel%20Release%20(WebKit2%20Tests)/r84311%20(10866)/compositing/iframes/invisible-nested-iframe-show-pretty-diff.html> for an example failure.
Expected failure results were checked in in r84783.
This test appears to be failing again on SL WK2: http://build.webkit.org/results/SnowLeopard%20Intel%20Release%20(WebKit2%20Tests)/r89613%20(12861)/compositing/iframes/invisible-nested-iframe-show-pretty-diff.html
I updated the Mac-WK2 results in http://trac.webkit.org/changeset/89629.