Comment 4 for bug 934292

similar problem and additional observation:

1) I've consistently had the exact same problem as described

2) In addition, I found a new mode today:

i. I switched from a single mode to dual monitor mode and thereafer my maximized windows on the larger remote screen were incorrect: the top of the window was about half way up the screen, and the right side was about 20 px outside the screen; the left and bottom aligned correctly. All applications I tried behaved this way. I'd never seen this before. Maximizing on the smaller primary display worked fine throughout

ii. logging out, restarting, disabling/reenabling 2nd display, resizing 2nd display all made no difference.

iii. because of teh above and on a whim, I tried moving the relative position of the screens because I observed that I had set the bottom of the larger remote screen slightly above the bottom of the laptop screen. As soon as I repositioned it so that the y location of smaller screen was within the Y envelope of the larger screen, maximizing a window on the larger screen started behaving correctly

iv. so the above is hopefully a hint as to what's causing the bug - and a potential workaround for those in the same situation. hope it all makes sense