The family of SVG animation elements should implement the ElementTimeControl interface when their "begin" or "end" attributes are set to "indefinite". WebKit doesn't seem to implement that so far.
Created attachment 5942 [details] Testcase for ElementTimeControl::beginElement()
This is a low visibility issue in an incomplete feature. Marking p4.
I think the test has wrong usage of getElementById. Anyway when correcting that there is no alert and the same anim as with Opera, so closing. Cheers, Rob.