Portal Layout from enterprise showcase is not working

[abthere]

I've just noticed that Portal Layout from enterprise showcase is not working. It produces the following log:

12:13:28.544:INFO:Log:initialized
12:13:30.180:WARN:TabBar:isc_TabSet_0_tabBar:ignoring bad or negative width: -17 [enable 'sizing' log for stack trace]
12:13:30.182:WARN:TabBar:isc_TabSet_0_tabBar:ignoring bad or negative width: -17 [enable 'sizing' log for stack trace]
12:13:30.182:WARN:TabBar:isc_TabSet_0_tabBar:ignoring bad or negative width: -17 [enable 'sizing' log for stack trace]
12:13:30.200:WARN:Log:Cannot change configuration property 'defaultPalette' to [TreePalette ID:isc_TreePalette_0] now that component isc_EditPane_0 has been created.
12:13:31.234:INFO:Log:isc.Page is loaded
12:13:37.784:MUP9:WARN:Log:Uncaught exception escaped: com.google.gwt.core.client.JavaScriptException
(TypeError) 
 __gwt$exception: <skipped>: c.__updateEditNode is not a function
    at rdb(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@48)
    at sEd(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@15791)
    at <anonymous>(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@508)
    at lc(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@29)
    at pc(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@57)
    at updateEditNode(http://www.smartclient.com/smartgwtee/showcase/showcase/E00CF45D6969CCE241243BD3E90F3145.cache.html@54)
    at isc_EditContext_getSerializeableTree(http://www.smartclient.com/smartgwtee/showcase/showcase/sc/modules/ISC_DataBinding.js?isc_version=11.0p_2016-04-27.js@760)
    at isc_EditContext_serializeChildData(http://www.smartclient.com/smartgwtee/showcase/showcase/sc/modules/ISC_DataBinding.js?isc_version=11.0p_2016-04-27.js@6)
    at isc_EditContext_getSerializeableTree(http://www.smartclient.com/smartgwtee/showcase/showcase/sc/modules/ISC_DataBinding.js?isc_version=11.0p_2016-04-27.js@6)
    at isc_EditContext_serializeChildData(http://www.smartclient.com/smartgwtee/showcase/showcase/sc/modules/ISC_DataBinding.js?isc_version=11.0p_2016-04-27.js@6)
12:13:39.816:TMR1:WARN:PortalColumnBody:PortalColumn0_rowLayout:couldn't find member to remove: [PortalRow ID:PortalRow0]

steps to reproduce:
1. navigate to http://www.smartclient.com/smartgwte.../#portalLayout
2. drag red canvas onto 1 portal column
3. right click on it and change the color
4. click Destroy and Recrate
5. observe that exception is thrown and the layout is recreated with the red canvas

Tested with
SmartClient Version: v11.0p_2016-04-27/AllModules Deployment (built 2016-04-27)
Google Chrome Version 50.0.2661.86 (64-bit)