Okay, I will try doing that. Now that I think about it, it is probably the Pixela VideoBrowser software that came bundled with my Canon camcorder that must have installed the codecs when I installed the software. If you're sure it's the codec that's causing this problem, then I will need to look at getting the codec upgraded/replaced; but I want to be sure that's what it is first before I start messing around with trying to install new codecs that may or may not solve the problem (or even potentially make it worse). What still puzzles me about this is the inconsistency of this "time" quirk. I haven't had this problem with 97% of these imported .mts files, it's only on a couple of random .mts files imported from the camcorder where I've had this come up.