I'm having the same problem as well. I'm running 64-bit OpenSuSE 13.1. I have a three vertical monitor setup, and when I first open MS Word, it spans across all three screens, though not completely (goes from the middle of the left screen to the middle of the right screen, and only extends down about halfway. At any rate, when I FIRST open it and the window is this size, I CAN resize it and move it around. However, as soon as I maximize it, I lose that ability. Maximizing it sometimes snaps to the size of one of the screens, but sometimes not. I can not move it to another screen once it is maximized either, which I can do just fine with any other running program. If I then proceed to unmaximize (restore) it again, it can no longer be either resized or moved like I could do earlier. At this point, I ALSO lose the ability to maximize once again (it's like it things that it's still maximized at this point - if I right-click on the top bar of the window, it still gives me the option to restore (which does nothing), and the maximize option is greyed out).
I tried installing libXcomposite1-32bit, hoping that's the package you were referring to in the previous post, but of course that did nothing.