diff --git a/core/pom.xml b/core/pom.xml
index a8de663126..bc83964194 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -51,7 +51,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>org.jenkins-ci.plugins.icon-shim</groupId>
       <artifactId>icon-set</artifactId>
-      <version>1.0.2</version>
+      <version>1.0.3</version>
     </dependency>
     <dependency>
       <groupId>${project.groupId}</groupId>
diff --git a/core/src/main/resources/hudson/model/AbstractProject/main.jelly b/core/src/main/resources/hudson/model/AbstractProject/main.jelly
index 6df6709acf..b62984982f 100644
--- a/core/src/main/resources/hudson/model/AbstractProject/main.jelly
+++ b/core/src/main/resources/hudson/model/AbstractProject/main.jelly
@@ -35,7 +35,8 @@ THE SOFTWARE.
   <table style="margin-top: 1em; margin-left:1em;">
 
     <j:forEach var="act" items="${it.prominentActions}">
-      <t:summary icon="${act.iconFileName}" href="${act.urlName}">
+      <j:set var="icon" value="${act.iconClassName != null ? act.iconClassName : act.iconFileName}"/>
+      <t:summary icon="${icon}" href="${act.urlName}">
         ${act.displayName}
       </t:summary>
     </j:forEach>
diff --git a/core/src/main/resources/jenkins/model/Jenkins/manage.jelly b/core/src/main/resources/jenkins/model/Jenkins/manage.jelly
index 5bac7f576c..5ea5bb2692 100644
--- a/core/src/main/resources/jenkins/model/Jenkins/manage.jelly
+++ b/core/src/main/resources/jenkins/model/Jenkins/manage.jelly
@@ -84,8 +84,9 @@ THE SOFTWARE.
     <table style="padding-left: 2em;" id="management-links">
       <j:forEach var="m" items="${it.managementLinks}">
         <l:hasPermission permission="${m.requiredPermission}">
-          <j:if test="${m.iconFileName!=null}">
-            <local:feature icon="${m.iconFileName}"      href="${m.urlName}"   title="${m.displayName}" requiresConfirmation="${m.requiresConfirmation}">
+          <j:set var="icon" value="${m.iconClassName != null ? m.iconClassName : m.iconFileName}"/>
+          <j:if test="${icon!=null}">
+            <local:feature icon="${icon}"      href="${m.urlName}"   title="${m.displayName}" requiresConfirmation="${m.requiresConfirmation}">
               <j:out value="${m.description}"/>
               <st:include it="${m}" page="info.jelly" optional="true"/>
             </local:feature>
diff --git a/core/src/main/resources/lib/hudson/actions.jelly b/core/src/main/resources/lib/hudson/actions.jelly
index c3f0b0675c..1a50cfc43e 100644
--- a/core/src/main/resources/lib/hudson/actions.jelly
+++ b/core/src/main/resources/lib/hudson/actions.jelly
@@ -37,8 +37,9 @@ THE SOFTWARE.
       the action object itself is available in the 'action' variable
     -->
     <st:include page="action.jelly" from="${action}" optional="true">
-      <j:if test="${action.iconFileName!=null}">
-        <l:task icon="${h.getIconFilePath(action)}" title="${action.displayName}"
+      <j:set var="icon" value="${action.iconClassName != null ? action.iconClassName + ' icon-md' : action.iconFileName}"/>
+      <j:if test="${icon!=null}">
+        <l:task icon="${icon}" title="${action.displayName}"
                 href="${h.getActionUrl(it.url,action)}" contextMenu="${h.isContextMenuVisible(action)}"/>
       </j:if>
     </st:include>
diff --git a/core/src/main/resources/lib/hudson/summary.jelly b/core/src/main/resources/lib/hudson/summary.jelly
index 78767dc9d0..b4fc33c176 100644
--- a/core/src/main/resources/lib/hudson/summary.jelly
+++ b/core/src/main/resources/lib/hudson/summary.jelly
@@ -58,7 +58,11 @@ THE SOFTWARE.
             that, we try deriving it by URL (assuming it's a full icon path).  If all that fails,
             we just fall back to the old method by passing a 'src' attribute to the <icon> tag.
           -->
-          <j:set var="iconMetadata" value="${icons.getIconByClassSpec(icons.toNormalizedIconNameClass(icon) + ' icon-xlg')}"/>
+          <j:set var="iconMetadata" value="${icons.getIconByClassSpec(icon + ' icon-xlg')}"/>
+          <j:if test="${iconMetadata == null}">
+            <!-- Icon could be provided as a simple iconFileName e.g. "settings.png" -->
+            <j:set var="iconMetadata" value="${icons.getIconByClassSpec(icons.toNormalizedIconNameClass(icon) + ' icon-xlg')}"/>
+          </j:if>
           <j:if test="${iconMetadata == null}">
             <j:set var="iconMetadata" value="${icons.getIconByUrl(icon)}"/>
           </j:if>
diff --git a/core/src/main/resources/lib/layout/task.jelly b/core/src/main/resources/lib/layout/task.jelly
index 167adcdf01..8c3a096263 100644
--- a/core/src/main/resources/lib/layout/task.jelly
+++ b/core/src/main/resources/lib/layout/task.jelly
@@ -105,7 +105,12 @@ THE SOFTWARE.
       -->
       <j:set var="iconMetadata" value="${icons.getIconByClassSpec(attrs.icon)}"/>
       <j:if test="${iconMetadata == null}">
-        <j:set var="iconMetadata" value="${icons.getIconByUrl(icon)}"/>
+        <!-- Icon could be provided as a simple iconFileName e.g. "settings.png" -->
+        <j:set var="iconMetadata" value="${icons.getIconByClassSpec(icons.toNormalizedIconNameClass(attrs.icon) + ' icon-md')}"/>
+      </j:if>
+      <j:if test="${iconMetadata == null}">
+        <!-- Icon could be provided as an absolute iconFileName e.g. "/plugin/foo/abc.png" -->
+        <j:set var="iconMetadata" value="${icons.getIconByUrl(attrs.icon)}"/>
       </j:if>
 
       <j:set var="icon" value="${rootURL}${icon.startsWith('images/') || icon.startsWith('plugin/') ? h.resourcePath : ''}/${icon}"/>