Story and Epic Overview tabs are empty in Eclipse

Since I switched from Juno to Luna, with the exact same Project Area configurations I now hit the issue, on all Project Areas, Overview Tab is coming out grey for Epic and Story. (which are using an out of the box layout for the Overview tab, although we do have extra attributes).

I finally found out that the offending item are the Progress atttributes, e.g.:
<presentation attributeId="com.ibm.team.apt.attribute.progress" kind="com.ibm.team.apt.kind.internal.progress"/>
If I remove them from the list of attributes in the Details section, the overview page comes out OK.

I think it's more of a defect than a feature, the log shows a ClassNotFound exception originating from the rtc script engine, on an internal class (org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) that has probably been removed in Luna.
Also, the bit of code that displays the tab content should come out gracefully when an exception is raised during processing of one of the items, i.e. display an error placeholder widget rather than blanking out the whole panel...

PhG

If you customized to add more than one section per slot to the Editor presentations,  in Eclipse it may not display properly.

Lawrence Smith [IBM]

The Project Area is considered to be misconfigured if the layout has more than one section per slot.  The bug is that it allows to have more than one section per slot and it works in the web.  This should be disallowed but works.  The workaround is to use additional tabs or other layouts.  There is an RFE to allow more than one section per slot in Eclipse.

This is showing up for me, too, on Eclipse Luna with RTC 4.0.4.  But It's not happening against the same repository and project area with Eclipse Juno and RTC 4.0.3.

What can be done? 

I am also facing the same when i use RTC with Luna. What's the solution ?
Is it something to do with eclipse configuration or RTC configuration ?

The issue is that somehow, the <presentation> tags with kind="com.ibm.team.apt.kind.internal.progress" do not work in Luna and break the layout of the tabs that have it in their layout.

The quick fix is to remove those tags <presentation kind="com.ibm.team.apt.kind.internal.progress"...> in the Project Area configuration's, Project Configuration Source tab.
Make sure you backup the config before.

In practice, you will want to do that in the story and epic details section, and remove the two lines: 

<presentation attributeId="com.ibm.team.apt.attribute.progress" kind="com.ibm.team.apt.kind.internal.progress"/>

See John's comment on the accepted answer above
Philippe