Modified to use ID, which is better for this kind of purpose.

core/src/main/java/hudson/model/ComputerSet.java

@@ -241,7 +241,7 @@ public final class ComputerSet extends AbstractModelObject {
                 return;
             }
 
-            NodeDescriptor d = NodeDescriptor.all().find(mode);
+            NodeDescriptor d = NodeDescriptor.all().findByName(mode);
             d.handleNewNodePage(this,name,req,rsp);
         }
     }

core/src/main/java/hudson/model/Descriptor.java

@@ -841,6 +841,12 @@ public abstract class Descriptor<T extends Describable<T>> implements Saveable {
             if(d.getClass().getName().equals(className))
                 return d;
         }
+        // Since we introduced Descriptor.getId(), it is a preferred method of identifying descriptor by a string.
+        // To make that migration easier without breaking compatibility, let's also match up with the id.
+        for (T d : list) {
+            if(d.getId().equals(className))
+                return d;
+        }
         return null;
     }
 

core/src/main/java/hudson/model/ItemGroupMixIn.java

@@ -171,7 +171,7 @@ public abstract class ItemGroupMixIn {
                     throw new Failure("No mode given");
 
                 // create empty job and redirect to the project config screen
-                result = createProject(Items.getDescriptor(mode), name, true);
+                result = createProject(Items.all().findByName(mode), name, true);
             }
         }
 

core/src/main/resources/lib/hudson/newFromList/form.jelly

@@ -33,18 +33,37 @@ THE SOFTWARE.
     @checkUrl    : form field validation url
 -->
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:s="/lib/form">
+  <st:documentation>
+    Generates a form for creating something out of descriptors by (1) selecting a descriptor and specifying a name.
+    This also presents a copy option. This should be placed inside &lt;l:main-panel>.
+
+    <st:attribute name="action">
+      Specify where the form will be submitted to. Defaults to 'createItem'.
+    </st:attribute>
+    <st:attribute name="descriptors" use="required">
+      Collection of Descriptors to be rendered.
+    </st:attribute>
+    <st:attribute name="nameTitle" use="required">
+      Caption of the text box to receive the name of the newly created item. Something like "Job name"
+    </st:attribute>
+    <st:attribute name="checkUrl" use="required">
+      URL relative to the context root of Jenkins that point to the check method that validates the new name.
+    </st:attribute>
+  </st:documentation>
+
+
   <j:set var="descriptors" value="${h.filterDescriptors(it,attrs.descriptors)}" />
 
-  <s:form method="post" action="createItem">
+  <s:form method="post" action="${attrs.action?:'createItem'}">
     <s:entry title="${attrs.nameTitle}">
-      <s:textbox id="name" name="name" checkUrl="'${rootURL}/${attrs.checkUrl}?value='+encodeURIComponent(this.value)"
+      <s:textbox id="name" name="name" checkUrl="'${rootURL}/${h.jsStringEscape(attrs.checkUrl)}?value='+encodeURIComponent(this.value)"
                  onchange="updateOk(this.form)" onkeyup="updateOk(this.form)" />
       <script>$('name').focus();</script>
     </s:entry>
 
     <j:forEach var="descriptor" items="${descriptors}">
       <s:block>
-        <input type="radio" name="mode" value="${descriptor.class.name}" onchange="updateOk(this.form)" onclick="updateOk(this.form)" />
+        <input type="radio" name="mode" value="${descriptor.id}" onchange="updateOk(this.form)" onclick="updateOk(this.form)" />
         <label class="attach-previous"><b>${descriptor.displayName}</b></label>
       </s:block>
       <s:entry>