If I highlight some text in Zondervan's Expositor's Bible Commentary (Volume 4, Kings, Chronicles, Ezra, Nehemiah and Job) and right-click on the highlighted text, the context menu does not show "Copy" as an option. I have to use the keyboard shortcut: Ctrl+C. It doesn't seem to matter where in the book I try this. I've only tried this book since I did the update to 4.0d so I can't tell you if it used to work prior to that update or not. (Actually, I think this series just became available about the same time as the update.)