Are you talking about viewing the stage area in Edit mode?
Can you please upload a screenshot of what you're seeing that you consider to be an issue?
Yes, stage in Edit View. About 8 pixels of my slide are hidden below the horizontal scrollbar and I have to scroll vertically to display them, pushing the upper 8 pixels out of the visible area at the topp of the screen. No big deal, but isn't the whole point of a 'best Fit' option that you can see everything without the need to scroll?
The rectangle Smart Shape on the screenshot below reaces exactly to the bottom of the slide. Yet, as you can see, the bottom stroke is hidden under the horizonatl scroll bar.
Amount of pixels hidden and if it's horizontal or vertical varies with Captiate windows size and project slide dimensions but it's never there in full.
I've just checked on my own Cp9 installation and it does look like there may be a few pixels hidden under the bottom edge. But frankly I think you may be worrying about something that isn't necessarily all that big a deal. If you need to see more of the project, then choose one of the other magnification options that shows it all.
When I'm using Best Fit view, I'm normally concentrating on stuff that's in the middle of the Edit stage, not what's on the edges. But that's just me.
If you feel it IS important, by all means log it as a bug. If enough people are worried about it like you are, Adobe may adjust the view percentage slightly on future versions. (No guarantees...)
I sure can live with it. I was just wandering if it's just me and if I'm overlooking something obvious. Thanks for checking, anyway.