First I created a SF Maintenance form and the only thing I dropped on it was a SF Browse dialog. I set the Search Field to LocationID and then setup the BO using the LocationsBO. I clicked Ok until I was back to the form.... saved it and went back in and the List Population Settings came up blank.
Secondly, I did the same thing with just a standard SF Form... didnt know if there might have been something different between a maintenance form and a standard form.
Hmmm....
The first test would be to create a new form with a new browsedialog to see if all of the settings "stick" then start to work backwards to see what is the catalist in your environment.
P.S. The second image illustrates a problem with browse dialogs that I mentioned about the DevExpress wrapped one...it appears it is doing the same thing with the StrataFrame one. Not sure if the problem is related.