Index: trunk/src/org/openstreetmap/josm/gui/preferences/TaggingPresetPreference.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/preferences/TaggingPresetPreference.java	(revision 3533)
+++ trunk/src/org/openstreetmap/josm/gui/preferences/TaggingPresetPreference.java	(revision 3534)
@@ -58,4 +58,5 @@
                             canLoad = true;
                         } catch (IOException e) {
+                            System.err.println(tr("Warning: Could not read tagging preset source: {0}", source));
                             ExtendedDialog ed = new ExtendedDialog(Main.parent, tr("Error"),
                                     new String[] {tr("Yes"), tr("No"), tr("Cancel")});
@@ -80,5 +81,7 @@
                         } catch (IOException e) {
                             // Should not happen, but at least show message
-                            JOptionPane.showMessageDialog(Main.parent, tr("Could not read tagging preset source {0}", source));
+                            String msg = tr("Could not read tagging preset source {0}", source);
+                            System.err.println(msg);
+                            JOptionPane.showMessageDialog(Main.parent, msg);
                             return false;
                         } catch (SAXParseException e) {
@@ -106,4 +109,5 @@
 
                         if (errorMessage != null) {
+                            System.err.println("Error: "+errorMessage);
                             int result = JOptionPane.showConfirmDialog(Main.parent, new JLabel(errorMessage), tr("Error"),
                                     JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.ERROR_MESSAGE);