How many of you that are experiencing this have upgraded the hard drive in your Humax? I just received my Humax DRT-400 last week from TiVo...and, I coastered five discs last night before getting out the DVD-RW it shipped with. It's never been able to burn that properly either. I upgraded the hard drive before I even first powered the unit on (it came pre-activated). Just wondering if this is something to do with large drives...or swap partition size being too small...or, possibly these units are just junk...?