Description of problem:
Frames with a border around their perimeter have traditionally been used for denoting groups of related controls. This is advantageous because it physically seperates disimilar controls, and also avoids repitition of the frame's label in individual member control labels. Unfortunately, they add visual noise that can both make a window appear more complex than it really is, and reduce the ability to quickly scan window elements.

Rather than using bordered frames, use frames without borders, bold labels to make the categories stand out, and indented contents. This, combined with good layout and spacing, is usually a better alternative to bordered.

How reproducible:
Configure Net Settings, etc.

Steps to Reproduce:
1. invoke any dialog using frames

Actual results:
Frames with borders.

Expected results:
Frames without borders, using bold labels, spacing and indentation.

Additional info:
Look at GNOME Human Interface Guidelines 2.2 [1]

[1] http://library.gnome.org/devel/hig-book/stable/controls-frames.html.en