Unable to select contents of a textbox in a header cell.

This is a minor annoyance of mine;

In Fx 2 and IE6 I can’t click and drag, nor use shift + click/arrow keys to select the text of content that is part of a complex header.
In the nightly Fx 3 (minefield dev build)  I can use shift + arrow keys to select text but it doesn’t highlight so it’s completely unusable.

Is there any way to fix this?

Actually it is blocked purposely
To unblock selection in grid you need to made next modifications

1. In dhtmlxgrid.css locate and erase all occurences of next line

    -moz-user-select:none;

2. In grid initialization code add next command

   grid.entBox.onselectstart = function(){ return true; };

Great thank you.