Can anyone confirm or negate whether the tileserver is down? Without changing the code i now got the error:
08.07.2013 21:47:17 org.jdesktop.swingx.mapviewer.AbstractTileFactory$TileRunner run
SCHWERWIEGEND: Failed to load a tile at url: http://tile.openstreetmap.org/15/17274/10767.png, retrying
java.net.ConnectException: Connection timed out: connect