A previous bug was reported about bad positioning of the resize mark when horizontal scrolling is used. This is not my problem as it's resolved now

Here is my situation : my page contains a JQuery UI Layout, and the center block contains the jQgrid.

A consequence is the resize mark having a left offset from the cursor corresponding to the size of the left pane of the layout.

I think exactly the same issue occurs if the grid is in an absolute positioned container, or some custom layout.

I corrected this by modifying grid.base.js :

@@ -860,10 +860,10 @@ $.fn.jqGrid = function( pin ) {
    cols:[],
    footers: [],
    dragStart: function(i,x,y) {
-       this.resizing = { idx: i, startX: x.clientX, sOL : x.clientX-6};
+       this.resizing = { idx: i, startX: x.clientX, sOL : x.clientX-1-$(this.bDiv).offset().left};
        this.hDiv.style.cursor = "col-resize";
        this.curGbox = $("#rs_m"+$.jgrid.jqID(p.id),"#gbox_"+$.jgrid.jqID(p.id));
-       this.curGbox.css({display:"block",left:x.clientX-6,top:y[1],height:y[2]});
+       this.curGbox.css({display:"block",left:this.resizing.sOL,top:y[1],height:y[2]});
        $(ts).triggerHandler("jqGridResizeStart", [x, i]);
        if($.isFunction(p.resizeStart)) { p.resizeStart.call(ts,x,i); }
        document.onselectstart=function(){return false;};