Index: /trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSStyleSource.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSStyleSource.java	(revision 7124)
+++ /trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSStyleSource.java	(revision 7125)
@@ -151,4 +151,7 @@
                 case "canvas":
                     canvasRules.add(r);
+                    break;
+                case "meta":
+                    break;
                 default:
                     final RuntimeException e = new RuntimeException(MessageFormat.format("Unknown MapCSS base selector {0}", base));