From my testing, it looks like it was broken @ revision 41818:

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r41818 | art.zambrano | 2014-07-17 14:12:04 -0700 (Thu, 17 Jul 2014) | 1 line

ICE-10132 changed default ajax execute values from @all to @this and changed ice.s() calls for ice.se() calls in various components
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From ICE-10132, I don't see the breadcrumb menu in the list of stuff that was tested or changed but the repository shows that some common menu code may have been impacted:

U    ace/component/src/org/icefaces/ace/component/pushbutton/PushButtonMeta.java
U    ace/component/src/org/icefaces/ace/component/maskedentry/MaskedEntryMeta.java
U    ace/component/src/org/icefaces/ace/component/menu/BaseMenuRenderer.java
U    ace/component/src/org/icefaces/ace/component/linkbutton/LinkButtonMeta.java
U    ace/component/src/org/icefaces/ace/component/radiobutton/RadioButtonMeta.java
U    ace/component/src/org/icefaces/ace/component/printer/PrinterMeta.java
U    ace/component/src/org/icefaces/ace/component/menuitem/MenuItemMeta.java
U    ace/component/resources/icefaces.ace/richtextentry/richtextentry.js
U    ace/component/resources/icefaces.ace/autocompleteentry/autocompleteentry.js

Rolled back the previous change for BaseMenuRenderer to use ice.s again. It seems that the tree component needs to execute as well so that the actionListeners are invoked.

Verified Icefaces 4 trunk r42085. Tomcat 7, all browsers.

Reopening because of a new issue with Breadcrumbs with URLs. After navigating to the page link in the Breadcrumb with URL, then using the Back button on the browser the province nodes cannot be opened up again (all browsers).
Steps:

• expand a province menu, as example Manitoba, by clicking the "+" sign -> city menu items are rendered underneath;
• click on a city, as example Winnipeg -> the crumbs are rendered on the right side of the page: Canada > Manitoba > Winnipeg.
• click on the province name (Manitoba) in the "Crumbs with URL's" menu -> the page is redirected to the wikipedia page for Manitoba.
• click back in the browser to navigate back to the showcase breadcrumbMenu page -> page redirection is completed.
• click on another "+" sign to open up the menuItem tags for a province -> this step fails.
  Sometimes, when trying to open another province node, the Mobi Components tab is enabled and the content of the page disappears. See Screenshot Breadcrumb.PNG

I cannot reproduce this last problem. I used Chrome, Firefox and Safari.

I am able to reproduce this sporadically (about half the time) using the latest jenkins build of ICEfaces4/trunk svn rvn#42156 (Chrome).

Sometimes when the clicking the Province in the tree fails to expand it, it will instead navigate to the top-level ACE Components overview for some reason.

This issue seems to be a regression caused by the commits made for ICE-10116. When running the showcase application the no-caching headers are not properly sent anymore. This makes the browser not re-evaluate the inline scripts when navigating with the back button.

Changed CachingHeaderPhaseListener into a system event listener to make sure the no-cache headers are setup after the navigation notifier has a chance to render.

Verified with IF4 trunk rev. 42335/42487 in FF31, IE10, Chrome36.