WebKit does not reject some cubic-bezier form values for transition-timing-function.
As per discussion on https://bugs.webkit.org/show_bug.cgi?id=105426#c9 we should reject cubic-bezier values where x values exceed the range [0,1].
Created attachment 181741 [details] Patch
Created attachment 181742 [details] Patch
Ah, that makes sense. Thanks :-)!
Comment on attachment 181742 [details] Patch Clearing flags on attachment: 181742 Committed r139106: <http://trac.webkit.org/changeset/139106>
All reviewed patches have been landed. Closing bug.