Index: trunk/src/org/openstreetmap/josm/tools/HttpClient.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/HttpClient.java	(revision 15741)
+++ trunk/src/org/openstreetmap/josm/tools/HttpClient.java	(revision 15742)
@@ -23,4 +23,5 @@
 import java.util.regex.Pattern;
 import java.util.zip.GZIPInputStream;
+import java.util.zip.InflaterInputStream;
 
 import org.openstreetmap.josm.data.validation.routines.DomainValidator;
@@ -112,5 +113,5 @@
         }
         this.requestMethod = requestMethod;
-        this.headers.put("Accept-Encoding", "gzip");
+        this.headers.put("Accept-Encoding", "gzip, deflate");
     }
 
@@ -376,5 +377,9 @@
             InputStream in = getInputStream();
             in = new ProgressInputStream(in, getContentLength(), monitor);
-            in = "gzip".equalsIgnoreCase(getContentEncoding()) ? new GZIPInputStream(in) : in;
+            in = "gzip".equalsIgnoreCase(getContentEncoding())
+                    ? new GZIPInputStream(in)
+                    : "deflate".equalsIgnoreCase(getContentEncoding())
+                    ? new InflaterInputStream(in)
+                    : in;
             Compression compression = Compression.NONE;
             if (uncompress) {