Comment 1 for bug 567331

If Nautilus has a requirement to fit within 600px, then this can be considered a bug. Marking as upstream.

B Bobo: Workaround, in the meantime, while pressing the Alt key you can drag the window from anywhere using the mouse. This is handy trick on computers with low resolutions.

The issue related to your resolution is a different one, please use the forums to seek assistance on that.