Comment 3 for bug 1327640

It could be that when you sync with the right deck, it's using an out-of-date position to sync against. The right deck seeks, and the left deck is already one buffer ahead.

You should do testing with the Latenight-Stacked skin, which has all the new features. Master sync is engaged by clicking and holding the sync button. But anyway, one-shot sync should work so I'll take a look at this.