I found that datatable will addStyle in _render_initial function, when you have more datatable in web page, or use SPA(switch Several ui), some css is not applied according to IE limitation (http://support.microsoft.com/en-us/kb/262161).
_render_initial:function(){
this._scrollSizeX = this._scrollSizeY = webix.ui.scrollSize;
webix.html.addStyle("#"+this._top_id +" .webix_cell { height:"+this._settings.rowHeight+"px; line-height:"+(this._settings.rowLineHeight || this._settings.rowHeight)+"px;" +(this._settings.fixedRowHeight?"":"white-space:normal;")+" }");
webix.html.addStyle("#"+this._top_id +" .webix_hcell { height:"+this._settings.headerRowHeight+"px; line-height:"+this._settings.headerRowHeight+"px;}");
this._render_initial = function(){};
},