The VisibleTitleBar is working as expected on our end - please find attached a screenshot of a small test that I did. In my code, I am setting this property in the declaration of a RadWindowManager and from code-behind - to a newly created RadWindow that is added as a standalone control. As you can see from the screenshot, there are no toolbars.
At this point I cannot tell what is the reason for this setting not to work on your side, but if you open a support ticket and send me a small sample that isolates this problem, I will check it right away.
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