I run a PLP setup with Nusphere running on the center screen. In version 13, Nusphere as started overflowing the monitor's bounds by about 10 pixels.

same for me

I get this as well on my three screen set up but only with the carbon theme.

Just checked on my Laptop, doesn't appear to be a multi screen issue, overflows on the laptop as well, behind task bar if task bar at bottom, over flows to the right of screen if I have the task bar to the left (my normal position).

All machines run Windows 8.1 but seeing as it is just that theme and not the other three seems as though the theme is just broken, which is a shame because it seems to be the best of the four.

Same here, on windows 8.1. with carbon theme and the PhpEd window maximized, it overflows a bit. It overflows into the task bar about 5px