suggested fix:

Index: D:/Documents and Settings/pbreau/workspace/ICEfaces/component/src/com/icesoft/faces/component/menubar/MenuItemRenderer.java
===================================================================
— D:/Documents and Settings/pbreau/workspace/ICEfaces/component/src/com/icesoft/faces/component/menubar/MenuItemRenderer.java (revision 15311)
+++ D:/Documents and Settings/pbreau/workspace/ICEfaces/component/src/com/icesoft/faces/component/menubar/MenuItemRenderer.java (working copy)
@@ -167,11 +167,12 @@
String qualifiedName = ((MenuItem) uiComponent).
getUserDefinedStyleClass(menuComponent.getItemStyleClass(),
rootItemSubClass);

• + String focusEvent = HTML.ONFOCUS_ATTR;
  if (uiComponent.getChildCount() > 0)

  Unknown macro: { topLevelDiv.setAttribute(HTML.CLASS_ATTR, CoreUtils.addPortletStyleClassToQualifiedClass( qualifiedName, rootItemSubClass, PORTLET_CSS_DEFAULT.PORTLET_MENU_CASCADE_ITEM)); String displayEvent = HTML.ONMOUSEOVER_ATTR;+ if (vertical) { String supermenu = menuComponent.getClientId(facesContext); Element parentNode = (Element) topLevelDiv.getParentNode(); @@ -182,19 +183,31 @@ "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);" + expand(supermenu, clientId + "_sub", KEYWORD_THIS) + "Ice.Menu.appendHoverClasses(this);"); + topLevelDiv.setAttribute(focusEvent, + "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);" + + expand(supermenu, clientId + "_sub", + KEYWORD_THIS) + "Ice.Menu.appendHoverClasses(this);"); } else { topLevelDiv.setAttribute(displayEvent, "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);" + expand("this", clientId + "_sub", KEYWORD_NULL) + "Ice.Menu.appendHoverClasses(this);"); + topLevelDiv.setAttribute(focusEvent, + "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);" + + expand("this", clientId + "_sub", + KEYWORD_NULL) + "Ice.Menu.appendHoverClasses(this);"); } }

  else

  { topLevelDiv.setAttribute(HTML.CLASS_ATTR, CoreUtils.addPortletStyleClassToQualifiedClass( qualifiedName, rootItemSubClass, PORTLET_CSS_DEFAULT.PORTLET_MENU_ITEM)); topLevelDiv.setAttribute(HTML.ONMOUSEOVER_ATTR, "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);Ice.Menu.appendHoverClasses(this);"); + topLevelDiv.setAttribute(focusEvent, + "Ice.Menu.hideOrphanedMenusNotRelatedTo(this);Ice.Menu.appendHoverClasses(this);"); + }

  topLevelDiv.setAttribute(HTML.ONMOUSEOUT_ATTR, "Ice.Menu.removeHoverClasses(this);");
  + topLevelDiv.setAttribute(HTML.ONBLUR_ATTR, "Ice.Menu.removeHoverClasses(this);");
  String title = ((MenuItem) uiComponent).getTitle();
  if(title != null && title.length() > 0)
  topLevelDiv.setAttribute(HTML.TITLE_ATTR, title);

revision 15419

There is an issue with the tab order of the menuItems. If you have more than one menuItems inside a menu and each of these menuItems has their own child menus, then using only tabs, it is only possible to enter the child menu of the last menuItem.

Example:
"File" is a top-level menuItem. "Open" and "Close" are child menuItems of "File". There are child menuItems inside both "Open" and "Close"

File
Open
File1
File2
Close
File3
File4

1st tab, "File" has focus, "Open" and "Close" are shown.
2nd tab, "Open" has focus, "File1" and "File2" are shown.
3rd tab, the focus rather than going to "File1", it goes to "Close", and "File3", "File4" are shown.
4th tab, focus goes to "File3".

We don't set the tab index on the HTML elements. Its browser default.

Need to investigate solutions for this.

revision 15720. The right arrow key will take the focus to the submenu

This is the structure of my menuBar:

File
Open
File1
File2
File3
Delete
File1
File2
File3
Edit
Submenu1
Submenu2
Submenu3

When I tab focus to "File", "Open" and "Delete" appear. From here there is two scenarios:
1) if I press the right arrow key, it will actually show the submenu of "Edit" rather than changing the focus into File's submenu.
2) if I press tab again it will show the submenu of "Open", but at the same time, the parent menu (Open and Delete) disappear.
From here, using tab will switch back to the parent menu; right arrow key does nothing.
In the end, you can't open the submenu of "Delete"

Tested with trunk at revision 15842

Attached test case

Please see the following case for more detail.
http://jira.icefaces.org/browse/ICE-2811