As of this morning, I am having the same issue. I submitted a bug report for it. It happens on both the Save File window and the Open File window. The windows fill almost my entire screen, although they are not truly full screen as there is a very slim strip of desktop visible on the sides and bottom. At upper right there is only the "X" and no minimize option or toggle between full screen/less than full screen. When I click and drag the sides or a corner, the window still does not resize. Extremely annoying.

@fishsticks255 In case you don't find sgunhouse's post helpful....

When you get that huge window that can't be moved or resized, look at the left side of the title bar for the window. Put your pointer up where it says "Save" (or "Open" if you're getting the huge window when you're trying to attach a file or something, as I was) at the left side of the title bar, and then double click. The window will resize to a smaller size, and will once again be adjustable like normal.

@donq That solved it!!!!! Thank You! Such a silly thing, but it was driving me nuts. I greatly appreciate the help.

@fishsticks255 In case you don't find sgunhouse's post helpful....

When you get that huge window that can't be moved or resized, look at the left side of the title bar for the window. Put your pointer up where it says "Save" (or "Open" if you're getting the huge window when you're trying to attach a file or something, as I was) at the left side of the title bar, and then double click. The window will resize to a smaller size, and will once again be adjustable like normal.

@donq That solved it!!!!! Thank You! Such a silly thing, but it was driving me nuts. I greatly appreciate the help.

As of this morning, I am having the same issue. I submitted a bug report for it. It happens on both the Save File window and the Open File window. The windows fill almost my entire screen, although they are not truly full screen as there is a very slim strip of desktop visible on the sides and bottom. At upper right there is only the "X" and no minimize option or toggle between full screen/less than full screen. When I click and drag the sides or a corner, the window still does not resize. Extremely annoying.