jQuery Grid Plugin - jqGrid

The problem seems to be that, when the browser scroll-bar is present, the initial load of the grid results in the grid scroll-bar sitting outside of the grid parent element. My grids all sit inside a parent DIV which provides an external title bar and external buttons to the grid.

See the video for a demonstration in Chrome (I have reproduced the problem in IE8, Firefox and Chrome).
http://screencast.com/t/ZjdkYjQ4

I'm Using jqGrid 3.6.5

The video begins showing a grid after initial load with few grid items (no grid scroll-bar), no browser scroll-bar, autoWidth:true and shrinkToFit:true

@ 10 seconds: I resize the browser to introduce its vertical scroll bar
@ 20 seconds: I demonstrate my custom window.resize setGridWidth() tracking 
@ 26 seconds: I reload the page with the same grid and demonstrate that the presence of the browser scroll-bar seems to cause the last grid column to overhang the parent element.
@ 38 seconds: I load a page with enough grid items to introduce the grid scroll-bar and demonstrate again that the presence of the browser scroll-bar seems to cause the grid scroll-bar column to overhang the parent element.
@ 47 seconds: I demonstrate again my custom window.resize setGridWidth() tracking AND how hitting setGridWidth() easily pulls the grid scroll-bar back inside the parent element.
@ 49 seconds: I eliminate the browser scroll-bar
@ 54 seconds: I reload the page and show the problem is gone when the browser scroll-bar is gone
@ 1 minute 3 seconds: I repeat most of the demo.