pauseSVGAnimation() is added just after pauseTransition() at r51567. // Oops, it's IWebFramePrivate again....
Created attachment 44662 [details] demonstrative vtable patching(screenshot), r51951 WebKit-SVN-r51951.zip still leads crashes when elements are rightclicked, at lease <A>. Removing pauseSVGAnimation() entry (from the vtable of IWebFramePrivate)(with binary editor) will prevent this crash, tested again with r51951.
There aren't any Windows nightlies any more.