Index: trunk/src/org/openstreetmap/josm/gui/download/UserQueryList.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/download/UserQueryList.java	(revision 14432)
+++ trunk/src/org/openstreetmap/josm/gui/download/UserQueryList.java	(revision 14433)
@@ -226,5 +226,5 @@
         List<SelectorItem> matchingItems = this.items.values().stream()
                 .sorted((i1, i2) -> i2.getLastEdit().compareTo(i1.getLastEdit()))
-                .filter(item -> item.getKey().contains(text))
+                .filter(item -> item.getKey().toLowerCase(Locale.ENGLISH).contains(text))
                 .collect(Collectors.toList());