java.io.IOException: BufferedInputStream закрыт в Android 2.3

Следующий код работает нормально в Android 1.5-2.2.1, но не в версии 2.3 и выше.

BufferedReader rd;
rd = new BufferedReader(new InputStreamReader(connection.getInputStream()));

StringBuffer sb = new StringBuffer();
String line;
while ((line = rd.readLine()) != null){
    sb.append(line);
}
rd.close();

Stracktrace:

01-30 08:21:42.668: WARN/System.err(594): java.io.IOException: BufferedInputStream is closed
01-30 08:21:42.668: WARN/System.err(594):     at java.io.BufferedInputStream.streamClosed(BufferedInputStream.java:116)
01-30 08:21:42.728: WARN/System.err(594):     at java.io.BufferedInputStream.read(BufferedInputStream.java:274)
01-30 08:21:42.728: WARN/System.err(594):     at org.apache.harmony.luni.internal.net.www.protocol.http.UnknownLengthHttpInputStream.read(UnknownLengthHttpInputStream.java:40)
01-30 08:21:42.758: WARN/System.err(594):     at java.io.InputStreamReader.read(InputStreamReader.java:255)
01-30 08:21:42.758: WARN/System.err(594):     at java.io.BufferedReader.fillBuf(BufferedReader.java:128)
01-30 08:21:42.758: WARN/System.err(594):     at java.io.BufferedReader.readLine(BufferedReader.java:357)

Это проблема? Изменилось ли что-нибудь в 2.3 ??