If you observe closely, you may see that these stars are shown only against some slides and not all of them.
The stars are just an indication that the particular slide has custom animation. That was you can quickly see at a glance if a slide has content that is animated.
The same star symbol is also shown when the slide itself has any slide transition set.
Select the whole document by pressing Ctrl+a.
Conduct a query and set the criteria as = August 8, 2008. I'm not sure if this is the right answer, but that's what I think it is.
Is this a question or answer? Either re-post correctly or ignore this.
Can you show a picture of the graph?