Photoshop :: Outer Stage Showing As Transparent Grid

So when I open a file that's say, 100px x 100px, usually the PS window would be gray except for a 100pxX100px white square, which is, of course, the stage. However, now instead of the gray outer region (whatever that's called), it is showing as if it was transparent. When I drag the doc window to resize it, the stage is "duplicated" randomly while the transparent outer region continues to grow. I've attached a screen shot. The white block below is the stage. The rest is inaccessible. Also, if I use the Type tool, the screen flickers to its inverse with each keystroke.