Index: trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java
===================================================================
--- trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java	(revision 3552)
+++ trunk/src/org/openstreetmap/josm/plugins/PluginInformation.java	(revision 3553)
@@ -218,5 +218,5 @@
             for (String entry : classPath.split(" ")) {
                 File entryFile;
-                if (new File(entry).isAbsolute()) {
+                if (new File(entry).isAbsolute() || file == null) {
                     entryFile = new File(entry);
                 } else {