When right-clicking on tokens to access options (in this case, to add them to the turn tracker, but it'll affect the menu in other situations too), the menu will go off-screen, leaving some options unavailable. In my case, any token on the top three rows will have, at the very least, the option to add them to the turn order be unavailable.
Using Windows 7 and Chrome 19.0.1084.52 with a screen resolution of 1024x600. A picture of the issue is attached; the right side and bottom are cropped, but the top of the picture is the top of my screen.