Index: src/org/opencms/workplace/list/CmsListResourceTypeIconAction.java
===================================================================
RCS file: /usr/local/cvs/opencms/src/org/opencms/workplace/list/CmsListResourceTypeIconAction.java,v
retrieving revision 1.8
diff -u -r1.8 CmsListResourceTypeIconAction.java
--- src/org/opencms/workplace/list/CmsListResourceTypeIconAction.java	18 Jan 2010 10:02:15 -0000	1.8
+++ src/org/opencms/workplace/list/CmsListResourceTypeIconAction.java	20 Jan 2010 18:17:41 -0000
@@ -31,7 +31,9 @@
 
 package org.opencms.workplace.list;
 
+import org.apache.commons.logging.Log;
 import org.opencms.i18n.CmsMessageContainer;
+import org.opencms.main.CmsLog;
 import org.opencms.main.OpenCms;
 import org.opencms.util.CmsStringUtil;
 import org.opencms.workplace.CmsWorkplace;
@@ -49,6 +51,9 @@
  */
 public class CmsListResourceTypeIconAction extends CmsListExplorerDirectAction {
 
+    /** The log object for this class. */
+    private static final Log LOG = CmsLog.getLog(CmsListResourceTypeIconAction.class);
+    
     /**
      * Default Constructor.<p>
      * 
@@ -148,7 +153,7 @@
         html.append(name);
         html.append("'");
         html.append(" style='display: block; width: 20px; height: 20px;'>");
-        if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(iconPath)) {
+        if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(iconPath) && hasFileExtension(iconPath)) {
             html.append("<img src='");
             html.append(CmsWorkplace.getSkinUri());
             if (!enabled) {
@@ -195,4 +200,12 @@
         }
         return html.toString();
     }
+
+    private boolean hasFileExtension(String iconPath) {
+        boolean hasFileExtension = iconPath.indexOf('.') != -1;
+        if (!hasFileExtension) {
+            LOG.warn("The filename seems invalid: '" + iconPath + "' (no File-Extension).");
+        }
+        return hasFileExtension;
+    }
 }