<HTML>Are you using QT 5? It just doesn't handle MP3s very well. Last QT verson to handle MP3s pretty well was QT 4.03. Even then it was pretty sucky.
Since you are working with 1.2.5, you can go back to 4.03 if you can find it.
Quite frankly ther is not alot you an do to make MP3s pristine other thanto bring them into Peak and sweeten there.
mike</HTML>