I would ask what actual interface purpose the tiny icons in front of each individual item in the browser serve. Many of them are indistinguishable to my eye, and they don't convey any information- but they do take up room.
The little light bulbs are hard for my over 60 eyes to see- it's hard to tell which ones are on or not when the browser list gets long. I wonder if the visibility message could be more clearly conveyed by highlighting or color shifting the text box (greyed for visibility off, say)- or even a bigger check box- just not something that relies on distinguishing between a very few pixels being either a yellow or a gray of about the same intensity.
I would also wonder if the different categories of folders in the browser could be better conveyed by different shapes at one end of the text box, by category outlines or category flags, by changing text weight (i.e. bold for top level folders such as Components, normal for lower level items), or colors- something that is apparent at a glance. Again, when the list gets long and requires scrolling, it's hard to tell where you are. New users are going to miss when new categories appear in the browser, like Analysis, because they look graphically just like everything else.
Ron