Sorry, Tony, but the links which you posted can't be read.

Tony,

I agree, that the usage of em instead of px would have many advantages. I am afrade that the changes can be not so simple. One have to change many height, margin and padding settings (but not all because in some situations icons with fixed pixel size are used).

My suggesting was about the first small step to improve CSS which uses jqGrid. jqGrid use not only own styles, but also jQuery UI CSS framework. So have have to take in consideration the standard jQuery UI CSS.

The line

.ui-jqgrid {position: relative; font-size:11px;}
from ui.jqgrid.css set font-size on the gbox. On the other side gbox div uses ui-widget ui-widget-content ui-corner-all classes too. Because of usage of ui-widget