What do the "*" (asterix) characters tell me in Work Allocations?

Just about all of the timelines in the example have an asterisk (except RTC Dev and the archived ones).

I pulled up my assignments on a test server and saw that all of them had an asterisk as well -- which doesn't make much sense since I just pulled the page up and had not changed anything yet. I played around with some of them hoping to make the asterisk go away and nothing seemed to worked. Then, when I saved it at one point, I got a popup dialog asking if I wanted to save the default allocations as well. I said "yes" and all of the asterisks went away.

So the asterisk would seem to indicate that the default allocation is not saved. As you can see, Adrian has been added to a lot of teams/projects and some sort of allocation has been made (likely be default) each time. As in my test above, I think if Adrian edited that page and answered "yes" to the "Save default allocations" dialog, all of those would go away.

Since the page is not actually made dirty, you don't get a prompt to save when you exit but if you do make the page dirty, it's going to ask to update all of those default allocations (then the asterisks would go away). This is all surmised by looking at the behavior -- I couldn't find the spot in the code that appends that asterisk, at least not quickly enough to bother.