I usually run the Passage Guide with all subcategories closed (hidden) for speed purposes. Then, I only open (show) those categories that I am interested in for a particular passage. I have noticed that occasionally when I attempt to open (show) a category such as "My Content" or "Music" and there is nothing to show for the particular search in question (hence it becomes grayed out), I cannot then close (hide) that category again. That is, the triangle remains "stuck" at open (show). This means that future uses of Passage Guide default to having those categories now open, thus slowing its rendering.
This is a very minor niggle.
Logos 4 is GREAT!