I recall some posts from the past where people had problems with music 1. skipping or tiny clicks and 2. Not looping smoothly.
I have solved this problem in my games now. Its all a question of your ogg format.
When i make a 99kbps ogg, not only does the music play perfectly with no skips, it also loops seamlessly, and continues to do so even when i have many actors on screen and the game is slowing down considerably.
I converted to ogg format using MediaMonkey (which is free) on a quality setting of 2.2. (99kbps)
Hope this helps!