Index: trunk/src/org/openstreetmap/josm/io/FileImporter.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/FileImporter.java	(revision 6631)
+++ trunk/src/org/openstreetmap/josm/io/FileImporter.java	(revision 6634)
@@ -146,5 +146,5 @@
         if (b != 'Z')
             throw new IOException(tr("Invalid bz2 file."));
-        return new CBZip2InputStream(bis);
+        return new CBZip2InputStream(bis, /* see #9537 */ true);
     }