GraffitiClient errors -- downloading public sketches

Exception.txt

11-30 11:48:58.671: W/System.err(672): org.codehaus.jackson.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
11-30 11:48:58.671: W/System.err(672):  at [Source: org.apache.http.conn.EofSensorInputStream@46009b68; line: 1, column: 2]
11-30 11:48:58.694: W/System.err(672): 	at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1432)
11-30 11:48:58.694: W/System.err(672): 	at org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParserMinimalBase.java:385)
11-30 11:48:58.701: W/System.err(672): 	at org.codehaus.jackson.impl.JsonParserMinimalBase._reportUnexpectedChar(JsonParserMinimalBase.java:306)
11-30 11:48:58.701: W/System.err(672): 	at org.codehaus.jackson.impl.Utf8StreamParser._handleUnexpectedValue(Utf8StreamParser.java:2084)
11-30 11:48:58.701: W/System.err(672): 	at org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8StreamParser.java:600)
11-30 11:48:58.701: W/System.err(672): 	at org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.java:486)
11-30 11:48:58.701: W/System.err(672): 	at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2761)
11-30 11:48:58.711: W/System.err(672): 	at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2709)
11-30 11:48:58.711: W/System.err(672): 	at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1900)
11-30 11:48:58.711: W/System.err(672): 	at srl.distributed.client.Client.sendRequest(Client.java:220)
11-30 11:48:58.711: W/System.err(672): 	at srl.distributed.client.Client.sendRequest(Client.java:164)
11-30 11:48:58.711: W/System.err(672): 	at srl.graffiti.client.nio.GraffitiClient$6.doInBackground(GraffitiClient.java:268)
11-30 11:48:58.711: W/System.err(672): 	at srl.graffiti.client.nio.GraffitiClient$6.doInBackground(GraffitiClient.java:1)
11-30 11:48:58.711: W/System.err(672): 	at android.os.AsyncTask$2.call(AsyncTask.java:185)
11-30 11:48:58.711: W/System.err(672): 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
11-30 11:48:58.711: W/System.err(672): 	at java.util.concurrent.FutureTask.run(FutureTask.java:137)
11-30 11:48:58.711: W/System.err(672): 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
11-30 11:48:58.711: W/System.err(672): 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
11-30 11:48:58.711: W/System.err(672): 	at java.lang.Thread.run(Thread.java:1096)
11-30 11:48:58.731: W/dalvikvm(672): threadid=9: thread exiting with uncaught exception (group=0x4001d800)

HomeActivity.java

public class HomeActivity extends Activity {
        // snip...

        // Experimental: download public sketches
	public void getSketches() {
		try {
			final class completionCallback implements Callback<Collection<PositionedSketch>> {
				Activity a;
				public completionCallback(Activity object) {
					a = object;
				}
				
				public void onCallback(Collection<PositionedSketch> data) {
					if(data != null) {
						// do something with data
					}
					else {
						// bitch about it
					}
					
					// TODO: hide progressbar
				}
			}
			
			// TODO: show progressbar
			GraffitiCom.getPublicPositionedSketches(new completionCallback(this));
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
}