Description Missing name 2011-12-19 12:05:58 EST

Build Identifier: n/a http://rap.eclipsesource.com/workbenchdemo/rms on Dec, 19 2011 1700-1800 CET

Just fooling around http://rap.eclipsesource.com/workbenchdemo/rms I clicked on some demos (see below for exact steps) And Javascript errors occured "Error: TypeError: e is null" 
Both on FF 8.0 and IE 9.0.8112.16421 64-bit on my Win7 64 bit and different other machines. 
Reloading does not help, reopening the browsers, emptying the cache and restarting Windows neither.

Message as shown by IE on Editorparts (Sorry German Windows):
Javascript error occurred:
Error: TypeError: Für die Eigenschaft "length" kann kein Wert abgerufen werden: Das Objekt ist Null oder undefiniert

  message: Für die Eigenschaft "length" kann kein Wert abgerufen werden: Das Objekt ist Null oder undefiniert
  description: Für die Eigenschaft "length" kann kein Wert abgerufen werden: Das Objekt ist Null oder undefiniert
  number: -2146823281
  name: TypeError
  Debug: off
  Phase: 2

Message by FF on "Editorparts":
Javascript error occurred:

Error: TypeError: e is null

  fileName: http://rap.eclipsesource.com/workbenchdemo/rms?custom_service_handler=org.eclipse.rwt.internal.resources.JSLibraryServiceHandler&hash=H-805493001
  lineNumber: 66
  Debug: off
  Phase: 2

Message on "Selection" section is longer, so I will attach it after sending.

Reproducible: Always

Steps to Reproduce:
1. Go to http://rap.eclipsesource.com/workbenchdemo/rms
2. Click on "do it" in "Editorparts" section

OR

1. Go to http://rap.eclipsesource.com/workbenchdemo/rms
2. Click on "Selection" section
3. Double-click on any entry in the Navigator
4. Dismiss the warning dialog
5. continue at 3. for at most five times until the error appears