Hi Matt. Thanks for replying.

The song is not frozen and there is no other audio playing. I have done some more testing and found that a) it seems to be related to the style used. If I change styles it plays correctly (at least the first time through), but when I go back to the original style it never works right (are there only certain styles that support time signature changes?), and b) with a different style if the section repeats, the time sig change plays correctly the first time through but not the second time through (it reverts to 4 beats per measure throughout). I have tried this with both the 32 bit and 64 bit versions.

Dan