We recently attempted to upgrade from Kendo 2014.2.716 to 2015.3.1116 and we've experienced several breaking changes along the way. We've resolved everything except for the following issue: when a Kendo Splitter is on an AngularUI modal, it does not render. This worked in the 2014 release, and has since stopped working.
Please see this Dojo for an example: http://dojo.telerik.com/IYOvA/7. I've included both sets of scripts, as it is important to use a more modern version of AngularJS than is bundled with the 2014 Kendo release to replicate our environment.