I've tested in Chrome (49.0.2623.112 m), Firefox (45.0.2), IE 11 (11.212.10586.0), and MS Edge (25.10586.0.0).
I'm having to programmatically resize some parent panes and a vertical splitter, it would be nice to bind that event and call my resize function there.
And while the contentLoad event doesn't appear to be working, the resize event does fire.
I'd also like to note that the kendoSplitter loads beautifully in IE 11.
Thanks!