I happy to announce that IFME no longer have sync issue, IFME 4.0.0.5 will keep frame rate mode and fps information! I google around and found IFME come with so many error, that old story, this new IFME! so I fix it, 2 new build-in addons will ship in next version!
If you want this fix, just ask! I will give a download link, got issue or problem, just ask! we try to fix!