Showcase-portlet:

1) Chart > Export
An error occurs in browser console when adding the Chart Export demo to the page, and the button to download chart is not rendered.
Issue reproduced also with EE-4.0.0.

FF41:
TypeError: ice.ace.instance(...) is null
http://localhost:8080/web/guest/ice01
Line 4

IE11:
Unable to get property 'exportToServer' of undefined or null reference

Chrome48:
Uncaught TypeError: Cannot read property 'exportToServer' of null(anonymous function) @ ice01:4

2) DataTable > Selection demo: similar errors seen when selectionMode=*Multiple and clicking the "Select All" or "Unselect All" buttons.
This is new functionality on this demo, added after EE-4.0.0 has been released.

FF41:
TypeError: ice.ace.instance(...) is null
http://localhost:8080/web/guest/ice01
Line 1

IE11:
Unable to get property 'selectAllRows' of undefined or null reference

Chrome48:
Uncaught TypeError: Cannot read property 'selectAllRows' of null