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.
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.
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....
I cannot reproduce your behavior as much as I am really trying to. If you create a new project, create a BO, drop on a browse dialog, and try to go through the same steps do you get the same results? Also, are you dropping the browse dialog directly on the form or is this an inherited browse dialog? Is the browse dialog dropped on a user control? Last, could you create a simple project that reproduces the behavior so I can test it on this side? Thanks.