Missing seek and speed controls on iPhone "iPod" app

Yesterday I wanted to skip the end of a podcast so I brought up the speed control and clicked it to twice as fast, however just after I did this, the speed control and the line beside it that allows you to seek backwards and forwards in the podcast vanished. This is the same for music I play, so I cant skip forward or back in a song.

I tried ending the application, restarting the phone, I can't see anything under settings for the iPod application. I really dont want to restore the phone for this, but now it's stuck playing on double speed and without the seeking control.

Anyone have any ideas on what I might do?