I see.
In the Pro Tutorial page you have the PQGrid css themes marked as optional so I had not included that:
<!--ParamQuery Grid custom theme e.g., office, bootstrap, rosy, chocolate, etc (optional)-->
<link rel="stylesheet" href="path to custom theme pqgrid.css" />
After I added that resource (see the same JSFiddle) it overwrites the jquery-ui custom theme.
Is it possible to have a jquery-ui custom theme and still have the freezeCols option work?
Cheers,
Geoff