I've got this problem on multiple projects with Xcode4/OS X 10.6:
No matter what I do, the editable NSTextField (containing text "Label") will never stick to the right-edge of the parent NSView.
The immediately adjacent NSTextfield (non-editable, text "Sprint Goal") always resizes correctly - with the exact same springs/struts it glues to the right-edge of the parent NSView.
I've got the same generic problem in multiple projects - right-hand-edges of editable NSTextField instances, with floating left-edge, are never, ever honoured. No matter what I do.
Bug? Something fundamental I'm missing here? All my other widgets and controls work "as expected", even with complex layouts. I can't get NSTextField to work even with simple layotus!