There is still some misalignment between header table and row table cells. This is more visible is the total width exceeds the page width say of 1024px.

I had to fix this bug by adding the style element to the header table.
$(grid.hTable).css({width: grid.width+”px”, marginRight:”20px”});
after creating the
grid.hTable = document.createElement(“table”);
at in grid.base.js

If the change is valid you can make it part of next release.
I am working on 3.1

Thanks
Sachin Mittal