issues with maixmizing a window

Currently running dual monitors in Vista on a Latitude D830 with an nVidia Quadro NVS 140M 256MB video card.  Whenever a window automatically maximizes itself (like when I open a document in an email and Word opens it in "Full Screen Reading View" or say I'm watching abc.com and I tell it to do "fullscreen HD"), the resulting maximized window will extend itself slightly (like 1-2mm) onto the adjacent monitor.  Because the window is maximized, I cannot adjust the size of the Window.  I would think that it mightly simply be a matter of adjusting the size of the image in my monitor's settings but it doesn't matter which monitor I maximize the window in, either one and it still extends slightly into the space of the other monitor. Oddly enough, all other times that I maximize a window by clicking the maximize button in the upper-right hand corner, it fills the monitor correctly and does not over extend/spill over onto the other monitor.  Its just when the window gets maximized by some means other than clicking the maximize button does it seem to spill over onto the other monitor.  I've looked into the various display contols in both my monitors and well as in Vista and can't seem to find a setting that would apply to this situation.  If anyone has any advice on how to fix this issue (more of an annoyance than anything else), it would be greatly appreciated.  Thanks in advance.