Index: trunk/src/org/openstreetmap/josm/tools/Utils.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/Utils.java	(revision 6997)
+++ trunk/src/org/openstreetmap/josm/tools/Utils.java	(revision 6999)
@@ -75,6 +75,7 @@
     private static final int MILLIS_OF_DAY = 86400000;
 
-    public static final String URL_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=";
-    
+    // Should us keep "%" character when fixing URL or encode it? Let us keep them for now, see #9937
+    public static final String URL_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=%";
+
     /**
      * Tests whether {@code predicate} applies to at least one elements from {@code collection}.