The CSS used on the page http://demo.opennms.org/opennms/asset/modify.jsp makes it hard to visually see where the text fields are that can be modified. (Tested with Firefox and Chrome on Windows 7)

I would include a screen shot, but for some reason in windows when I take a screen shot of the browser window its not doing any of the alpha layering so the boxes all show up grey.

input.suggBox - gwt-asset.css line 92
input.textBox - gwt-asset.css line 98
input.passBox - gwt-asset.css line 104
input.dateBox - gwt-asset.css line 110

It seems the CSS for these objects uses a background-color of #eee and that is the same that #content uses on the page.