Description of problem
A clean, logical dialog layout helps the user to quickly understand what information is required from them. It's very important to have proper spacing between window borders, controls and separators (if used), controls alignment etc.

How reproducible:


Steps to Reproduce
1. invoke any dialog

Actual results
Incorrect controls spacing and alignment.

Expected results
Correct window/dialog layout.

Additional info
Look at GNOME Human Interface Guidelines 2.2 [1] [2] [3]

[1] http://library.gnome.org/devel/hig-book/stable/design-window.html.en 
[2] http://library.gnome.org/devel/hig-book/stable/windows-dialog.html.en 
[3] http://library.gnome.org/devel/hig-book/stable/windows-alert.html.en#alert-spacing