Index: trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java
===================================================================
--- trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java	(revision 3531)
+++ trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java	(revision 3532)
@@ -155,4 +155,12 @@
             s = attr.getValue("Plugin-Link");
         }
+        if(s != null) {
+            try {
+                URL url = new URL(s);
+            } catch (MalformedURLException e) {
+                System.out.println(tr("Invalid URL ''{0}'' in plugin {1}", s, name));
+                s = null;
+            }
+        }
         link = s;
         requires = attr.getValue("Plugin-Requires");