OS X Mavericks :: Why No Longer Hide Table Of Contents In Preview

I am a student and I use Preview to read my textbooks as most are available as PDF documents. However, since upgrading to Mavericks I am having trouble with very basic features that worked in Mountain Lion. Specifically, the table of contents no longer seems to function properly. My books are often well over a thousand pages, and thumbnail view is practically useless. I require the table of contents in order to navigate efficiently. My problem is that (since updating to the new OS last night) I am no longer able to hide the table of contents.

I will clarify further. In Mountain Lion, if one were to use preview in full screen mode, the user could select "Table of Contents" from the View menu and then select "Content Only" from the same menu. This would hide the sidebar. And upon mousing over the left edge of the screen the sidebar would pop out, displaying the table of contents and allowing successful navigation. Now, in Mavericks, after going through the same process, mousing over the edge of the screen causes the sidebar to pop out, but only displays thumbnails. Not the table of contents.

The 15" MBP screen is too small to display two pages side by side with the sidebar taking up 1/4 the screen. Hiding the sidebar is the only way to fit what I need on the screen. I am constantly flipping from page to page and need the table of contents handy. Why would Apple break this functionality?