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/EventHandlers.java
.append( "	 	         textObj = new BuildHelper(\"tspan\",\n" ) 
			.append( "	   	             {x: 5\n" ) 
			.append( "		             },multiLine[x]);\n" ) 
			.append( "	                 }\n" ) 
			.append( "	                 else{\n" ) 
			.append( "	 	         textObj = new BuildHelper(\"tspan\",\n" ) 
			.append( "	   	             {x: 5,\n" ) 
			.append( "	                      dy:17\n" ) 
			.append( "		             },multiLine[x]);\n" ) 
			.append( "	                 }\n" ) 
			.append( "		      textObj.addToParent(textElement.element);\n" ) 
			.append( "	            }\n" ) 
			.append( "	        }\n" ) 
			.append( "		\n" ) 
			.append( "	TM.getTitleElement = function TM_getTitleElement(evt){\n" ) 
			.append( "	    var elem = evt.currentTarget;\n" ) 
			.append( "	if (elem == null ) return;	\n" ) 
			.append( "	    var childs = elem.childNodes;\n" ) 
			.append( "	    for (var x=0; x<childs.length; x++){\n" ) 
			.append( "		if (childs.item(x).nodeType == 1 && childs.item(x).nodeName == \"title\")\n" ) 
			.append( "		    return childs.item(x);\n" ) 
			.append( "	    }\n" ) 
			.append( "	    return null;\n" ) 
			.append( "	}\n" ) 
			.append( "		\n" ) 
			.append( "	TM.getText = function TM_getText(elem){\n" ) 
			.append( "	   var childs = elem ? elem.childNodes : null;\n" ) 
			.append( "	   for (var x = 0;  childs && x < childs.length; x++)\n" ) 
			.append( "	      if (childs.item(x).nodeType == 3)\n" ) 
			.append( "		  return childs.item(x).nodeValue;\n" )