Issue with Legend in IE
Was having issue in IE8 when using a legend. The exception was down in jquery trying to assign paddingTop="0.5empx". Made a change in line 7386 of jquery.jplot.js:
var rs = (pad) ? this.rowSpacing : '0px'; //var rs = (pad) ? this.rowSpacing + 'px' : '0px';
seemed to fix it....