[FixThisPOSSite]

Vague indeed. There are so many examples of what NOT to do out there, it would've been easy to highlight some. Like this: http://www.flickr.com/photos/forensicpics/7257657796/in/set-...

And here's one that precisely illustrates what he was saying about a control's appearance reflecting the way it'll work: http://www.flickr.com/photos/forensicpics/4361736097/in/set-...

The article also fails to call out one of the worst trends in UI today: the Peek-a-Boo UI that hides things until AFTER you've accidentally rolled over them: http://www.flickr.com/photos/forensicpics/7252519646/in/set-...

http://www.flickr.com/photos/forensicpics/5817845518/in/set-...

Then there's the mistake of hard-coding colors in your UI, and failing to test it with different color schemes:

http://www.flickr.com/photos/forensicpics/5889365199/in/phot...

http://www.flickr.com/photos/forensicpics/528235915/in/set-7...

http://www.flickr.com/photos/forensicpics/528235913/in/set-7...

http://www.flickr.com/photos/forensicpics/6890158811/in/set-...

How about idiotic menu organization? http://www.flickr.com/photos/forensicpics/6322822823/in/set-...

Putting stuff under the wrong menu: http://www.flickr.com/photos/forensicpics/5630390118/in/phot...

Or failure to indicate that ANY controls are present? http://www.flickr.com/photos/forensicpics/6645852949/in/phot...