We are using Dashboard Design version 6.0.5.0 Build 14,0,5,974. For some reason when I go to Preview after working on the dashboard for a while it will get stuck on Initializing… The only solution I have found it to start over and create a new dashboard (one simple universe, two Query Prompt Selectors, and a column chart). The one thing I suspect (since it is not officially supported by SAP) is that they have recently upgraded my MS-Office to 2013.
kevlray 
(BOB member since 2010-06-23)