We are pretty sure we have homed in on the problem that can cause loops of ~6 seconds duration in playback with this new software update. It is associated only with iTunes 12.4, and only affects playback in “Minimize iTunes Interaction” mode. The solution is to avoid using this mode. However, it appears that additional steps are required to turn this mode off (or on). First uncheck the “Minimize iTunes Interaction” check box in the iTunes tab of BitPerfect’s Preferences Window. Next, close the Preferences Window, and select “Disable BitPerfect” from BitPerfect’s menu bar drop-down menu. Finally, re-enable BitPerfect again by selecting “Enable BitPerfect” from BitPerfect’s menu bar drop-down menu.
I have been using this combination all day yesterday with “Minimize iTunes Mode” disabled, and have encountered no further problems. I am also getting feedback from some of our users who have been trying out this fix for me, and it seems they are also reporting no further problems. Therefore I am cautiously recommending to BitPerfect users that you can safely make this update if you choose to do so, provided you follow the measures I described.
For the time being we still don’t know what the specific root cause is, but when we do find out, if a workaround can be found to re-enable “Minimize iTunes Interaction” mode we will include it in our next version update.