Bug 145144 SVG Interactivity cannot highlight gradient colors
Create any SVG Chart with gradient colors on the series palette. Add interactivity on series to highlight them on mouseover for instance (or mouse click) The highlight doesn't work. It works for plain colors only.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGGraphics2D.java
return stroke;
	}
	/**
	 * @param stroke
	 *            The stroke to set.
	 */
	public void setStroke( Stroke stroke )
	{
		this.stroke = stroke;
	}
	/**
	 * @param paint
	 *            The paint to set.
	 */
	public void setPaint( Paint paint )
	{
		if ( paint instanceof GradientPaint )
		{
			SVGGradientPaint gp = new SVGGradientPaint( (GradientPaint) paint );
			int index = paints.indexOf( gp );
			if ( index == -1 )
			{
				paints.add( gp );
				definitions.appendChild( createGradientPaint( gp ) );
			}
			else
			{
				gp = (SVGGradientPaint) paints.get( index );
			}
			this.paint = gp;