Maybe I'm just a sad user with only a small one (1024x768) but my Zimbra window (Web client) doesn't quite fit. With a maximised screen, I can't reach the "next page" control. The only way is to stretch the window so it is wider than the physical screen, then move the window so that the left hand edge is off the side. See attached screenshot (suitably censored!)
Should there be a scroll control somewhere?