I not sure if this has been posted but dont you hate it when you click preview and the song you are d/l takes ages to start! I find that if you dissconnect from the server and then reconnect (i use jump supernnode as it does both) that your song will start straight away.
Not reccomended if you have heaps of d/l's going and you dont want to interupt them!
However if you are just d/l 1 song and want to check that it is right then give it a go!
Works for me!