Hello Rob Lange,
I'd like to start by clarifying for you some of the inner workings of the framework so that you can better understand how things are supposed to work.
The AutoDomRefresh means that the framework will automatically take a snapshot of the browsers DOM after some significant event happens e.g. navigate step, button click, drop down selection, etc. The framework maintains a cached copy of the DOM for performance reasons. If we didn't the tests would run painfully slowly.
Regarding your combobox issue... is this a Silverlight or an HTML combobox? If it's Silverlight, I'm afraid what you're doing is probably the expected behavior. Frequently combobox's are databound and don't populate the Silverlight VisualTree until it's actually opened. It's the normal behavior of databound visual controls in Silverlight. If the elements (the combobox items) are not a part of the VisualTree we can't see them to work with them. Or is it an HTML combobox? If so, what is being used to populate it's list of items from the webserver?
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